Nice short game, that is very well polished.
Things that caught my eye:
- You have made the effort to do it in 3 different OS
- Character movements control feel just right
- Screen got darker as the time was running out
- Music rewinds as well along with the traps
- Door eye ball looks looks cool and creepy at the same time
I really enjoy my play through, the game is not long and tedious and the puzzles don't make me feel dumb. I appreciate that as most puzzle games are too hard and its boring to get stuck on a single level for too long. Well done! This is in my top 10 list! Check out "To Grow" as well the game is similar to yours and i think you will enjoy it.
PS: If your interested in old school FPS try my game out its an endless runner with graphics style similar to the original DOOM. Cheers!