looks really cute. Tried it. error withing 2 min. Hope this helps.
Error
src/game/gui/init.lua:570: attempt to index local 'sprite' (a nil value)
Traceback
main.lua:178: in function 'handler'
src/game/gui/init.lua:570: in function 'after'
lib/hump/timer.lua:44: in function 'updateTimerHandle'
lib/hump/timer.lua:63: in function 'update'
src/game/gui/init.lua:290: in function 'update'
src/game/init.lua:365: in function 'update'
main.lua:104: in function <main.lua:80>
[C]: in function 'xpcall'