Gameplay was interesting-could have given some instructions for controls, though. Took me ages to realize to use space for interaction. Some hints for confused players:
SPACE to interact
P for option menu (in-game)
To restart lock, change to 0, close screen and come back
To pop the lock, press DOWN or S
My theory on the ending is that you've been playing Convict the entire time. 4 stars because I had to reset the game 3 times.