Flappy Ghost!! :D
One of my vague initial ideas was going to be Flappy Vampire Bat :P. Glad to see someone do this type of thing, and do it well, with their own touch and feel.
Collecting gems along the way, the level up system, obsticles to avoid, worked well together.
Level 2 took me ages to complete,.. level 3 zoomed by quite quickly,.. might be some small balance tweaking required... but that's for moving the project forward :).
Great job on creating this game loop, perfect for Jam games.
Well done!