Thank you very much for your feedback, and I'm glad you enjoyed it!
The sticky jump feedback is something I get on pretty much every platformer I make, so adding coyote time to jumps is a must for future jam projects.
And I tried to add a warning not to mistake the stalagmites / stalactites for spikes, but I do agree that I should have designed them differently. If I were to redesign them, I would add a dithering effect to make them less visible.
Again, thank you for your feedback and I'm glad you enjoyed the game!