The presentation and polish is great, a simple idea, with many levels to have fun with.
On the gameplay side, it is a bit frustrating, the platforming could be more friendly to the player. Like other mentioned the coyote time could be a bit longer.
Reading some comments and responses, I would say that many people found my games hard as well, in the end I believe it's better to risk having an easy game that makes players feel bored or invincible rather than a very hard game that frustrates players and makes them feel "bad".
Overall a very good game, I hope you balance the platforming a bit post-jam because I bookmarked it :D