diff --git a/Makefile b/Makefile
index 535b917139..cde2941f94 100644
--- a/Makefile
+++ b/Makefile
@@ -6,12 +6,15 @@ help: ## show this help
 update: ## update git submodules
 	git submodule update
 
-build: update build_stmhal build_unix ## build both stmhal and unix micropython ports
+build: build_stmhal build_unix ## build both stmhal and unix micropython ports
 
-build_stmhal: ## build stmhal port
+build_stmhal: update ## build stmhal port
 	make -C vendor/micropython/stmhal
 
-build_unix: ## build unix port
+build_unix: update ## build unix port (32-bit)
+	make -C vendor/micropython/unix MICROPY_FORCE_32BIT=1
+
+build_unix64: update ## build unix port (64-bit)
 	make -C vendor/micropython/unix
 
 run_unix: ## run unix port
@@ -41,8 +44,8 @@ gdb: ## start remote gdb session which connects to the openocd
 
 load: ## load contents of src into mass storage of trezor
 	rm -rf /run/media/${USER}/PYBFLASH/*
+	cp -a src/apps /run/media/${USER}/PYBFLASH/
 	cp -a src/lib /run/media/${USER}/PYBFLASH/
-	cp -a src/playground /run/media/${USER}/PYBFLASH/
 	cp -a src/trezor /run/media/${USER}/PYBFLASH/
 	cp -a src/*.py /run/media/${USER}/PYBFLASH/
 	sync
diff --git a/extmod/modtrezormsg/modtrezormsg-stmhal.h b/extmod/modtrezormsg/modtrezormsg-stmhal.h
index b0acdbd58c..67ab6b477f 100644
--- a/extmod/modtrezormsg/modtrezormsg-stmhal.h
+++ b/extmod/modtrezormsg/modtrezormsg-stmhal.h
@@ -1,3 +1,5 @@
+#include <usrsw.h>
+
 void msg_init(void)
 {
 }
@@ -14,5 +16,18 @@ int msg_send(uint8_t *buf, size_t len)
 
 uint32_t msg_poll_ui_event(void)
 {
-    return 0;
+    static int lp = 0;
+    uint32_t r = 0;
+    int p = switch_get();
+    if (lp == 0 && p == 1) {
+        r = 0x00010000; // touch start
+    } else
+    if (lp == 1 && p == 1) {
+        r = 0x00020000; // touch move
+    }
+    if (lp == 1 && p == 0) {
+        r = 0x00030000; // touch end
+    }
+    lp = p;
+    return r;
 }
diff --git a/src/playground/__init__.py b/src/playground/__init__.py
deleted file mode 100644
index b901a920a2..0000000000
--- a/src/playground/__init__.py
+++ /dev/null
@@ -1,147 +0,0 @@
-# import time
-import sys
-sys.path.append('lib')
-import utime
-import math
-import gc
-
-# import transport_pipe as pipe
-
-# from trezor import msg
-from trezor import loop
-from trezor.utils import unimport_gen, unimport_func
-from trezor import layout
-from trezor import ui
-
-if __debug__:
-    import logging
-    logging.basicConfig(level=logging.INFO)
-
-def perf_info():
-    mem_alloc = gc.mem_alloc()
-    gc.collect()
-    print("mem_alloc: %s/%s, last_sleep: %d" % \
-          (mem_alloc, gc.mem_alloc(), loop.last_sleep))
-    loop.call_later(1000000, perf_info)
-
-'''
-def animate():
-    col = 0
-    # hawcons gesture
-    f = open('playground/tap_64.toig', 'r')
-
-    while True:
-        col %= 0xff
-        col += 0x0f
-
-        ui.display.icon(190, 170, f.read(), ui.rgbcolor(col, 0, 0), 0xffff)
-        f.seek(0)
-
-        yield loop.Sleep(int(0.5 * 1000000))
-
-sec = 0
-event = None
-def sekunda(x):
-    global sec
-    print('Sekunda %d' % sec)
-    
-
-    if sec == 0:
-        # if loop.button_cb:
-        #    loop.call_soon(loop.button_cb, 'levy')
-        #    loop.button_cb = None
-        return
-
-    sec += 1
-    loop.call_later(1, sekunda, x)
-
-def wait_for():
-    print("Jsem tady")
-
-    ktery = yield loop.IOButton()
-    print(ktery)
-    
-    print("Po cekani na event")
-'''
-
-def tap_to_confirm(address, amount, currency):
-
-    loop.call_later(5 * 1000000, layout.change(homescreen()))
-
-    ui.display.bar(0, 0, 240, 40, ui.GREEN)
-    ui.display.bar(0, 40, 240, 200, ui.WHITE)
-
-    ui.display.text(10, 28, 'Sending', ui.BOLD, ui.WHITE, ui.GREEN)
-    ui.display.text(10, 80, '%f %s' % (amount, currency), ui.BOLD, ui.BLACK, ui.WHITE)
-    ui.display.text(10, 110, 'to this address:', ui.NORMAL, ui.BLACK, ui.WHITE)
-    ui.display.text(10, 140, address[:18], ui.MONO, ui.BLACK, ui.WHITE)
-    ui.display.text(10, 160, address[18:], ui.MONO, ui.BLACK, ui.WHITE)
-
-    f = open('playground/tap_64.toig', 'r')
-    _background = ui.rgbcolor(255, 255, 255)
-
-    def func(foreground):
-        ui.display.text(68, 212, 'TAP TO CONFIRM', 2, foreground, _background)
-
-        f.seek(0)
-        ui.display.icon(3, 170, f.read(), _background, foreground)
-
-    yield from ui.animate_pulse(func, ui.BLACK, ui.GREY)  # , delay=10000)
-
-'''
-def on_read():
-    print("READY TO READ")
-    print(msg.read())
-'''
-
-@unimport_func
-def zprava():
-    from _io import BytesIO
-
-    from trezor.messages.GetAddress import GetAddress
-
-    m = GetAddress()
-    m.address_n = [1, 2, 3]
-    m.show_display = True
-
-    print(m.__dict__)
-    f = BytesIO()
-    m.dump(f)
-    data = f.getvalue()
-    f.close()
-    print(data)
-    # m2 = GetAddress.load(BytesIO(data))
-    # print(m2.__dict__)
-
-def homescreen():
-    print("Homescreen layout!")
-
-    loop.call_later(5 * 1000000, layout.change(tap_to_confirm('1BitkeyP2nDd5oa64x7AjvBbbwST54W5Zmx2', 110.126967, 'BTC')))
-
-    ui.display.bar(0, 0, 240, 240, ui.WHITE)
-
-    f = open('playground/trezor.toig', 'r')
-
-    def func(foreground):
-        f.seek(0)
-        ui.display.icon(0, 0, f.read(), foreground, ui.BLACK)
-    yield from ui.animate_pulse(func, ui.WHITE, ui.GREY, speed=400000)
-
-def run():
-    ui.touch.start(lambda x, y: print('touch start %d %d\n' % (x, y)))
-    ui.touch.move(lambda x, y: print('touch move %d %d\n' % (x, y)))
-    ui.touch.end(lambda x, y: print('touch end %d %d\n' % (x, y)))
-
-    # pipe.init('../pipe', on_read)
-    # msg.set_notify(on_read)
-
-    zprava()
-    
-    loop.call_soon(perf_info)
-    loop.call_soon(layout.set_main(homescreen()))
-
-    # loop.call_later(10 * 1000000, layout.change(tap_to_confirm('1BitkeyP2nDd5oa64x7AjvBbbwST54W5Zmx2', 110.126967, 'BTC')))
-    # loop.call_soon(animate())
-
-    loop.run_forever()
-    loop.close()