Good job :)

Hah, had fun, gj!

Flappy ghost! love it! and just as infuriating! Well done, it kept me amused.

Got to 76 I think.

Fun game, kinda like flappy birds.

Started quite easy, but level 3 was really hard haha

Great job

cute ghost. was a lot harder than i was expecting when i got to the second level. got a bit confused when some spikes did 1 dmg and others did 10. never knew when to risk for a gem or just let it slide. but overall good job

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!

Level 2 was tough! don't know if i died in level 3 or won it - I was a junior ghost in the end, so maybe not the finale ;-) very well put together and a nice variation of the flappy formula.
2 quick notes:
- it was virtually impossible to know which spikes were the really dangerous ones, because the color coding didn't seem to follow a specific logic - the flying enemies were easier to learn because of their distinct shape.
- if you want to create a parallax effect by moving the background at a different speed, it should move slower than the foreground, because of the rules of perspective. yours was moving faster and therefore disorienting.

Well-balanced flappy game. I like you don't immediately die after one mistake. Good work!