Enjoying this immensely. Wanted to share 2 things:
1) After coming back from a reward (brief moment of invulnerability), if you try to use the arrow keys to move too quickly, you are prevented. They seem to take a second or so to initialize.
2) It seems that when 4 options pop up (luck), the choices given will roll over. Going down on the bottom will return you to the top. Pressing up on the top will bring you to the bottom. This behavior is different and can result in accidental choices.