I like the concept! Very straightforward. My suggestions are: 1) improve the jumping physics, 2) player should move with the moving platform, 3) I don't see a point why the "reveal block" should disappear if the player can always restart the level, unless the level is really long. Shame that it doesn't have a music though... But overall, a solid game jam entry!
Please check out my game! I would love to hear your feedback and rating!