Few bugs here and there as You pointed out... But for a first game this is surprisingly solid! I think it might have been over scaled, but its kind of completed and I can't say this about a lot of my games;)
I think the dashing was unnecessary, I don't know what it did, and I couldn't read tutorial messages at all - something gliched. I think You could - for this jam - end this game with like secret item behind last door that opens upon collecting like 100 coins, with which You can somehow kill those skeletons.
Or there is an ending and I couldn't get to it?:D
Anyway, cool game. Hope You'll continue with it at least to at least have a nice ending.