As for the key binds, you're right, we should've added reconfigurable keybinds, we've added all of the keybinds to the game in the main page so hopefully it'll clear things up, but yeah, restarting the level was essential for some of the puzzles, it's R
The footsteps are a dumb bug it'll get fixed, and as for the main mechanic, the game could be expanded, this is something we really want to do, thanks a lot for your feedback!