This is a simple but fun concept. I enjoyed playing this and the reset/check points felt fair. (Though I'm sure there are those die-hard masochists that would enjoy a mode requiring zero deaths or something, lol). What I'd still like to see would be a short death sequence. Something with an animation or explosion and/or a sound of some sort, not long but just enough to create a little pause before resetting the game. As it is now, it jumps so fast from dying to replaying it can cause a quick successive death.

Actually I quite enjoyed this game. It is simple, but requires reflexes. As I was playing, it occurred to me that it would be nice to have a "turn" counter and level design in such a way that you need to complete the game with the least number of direction changes. This can be very simple in corridors, but in complex rooms there can be many solutions. If you add different doors to different rooms instead of one door, then there can be a lot of variants to complete the level level, which will increase interest in search optimal solutions. In this case it will be mix of puzzle and reflexes game.