Thanks! There is a gem in the first room that you need air dash to get & is very hard to find, I wouldn't be surprised if that was the last one. I like the idea of having a gem counter for each room, that would make things much easier.
I'll have to look into making the map feel more connected. It gives a nice feeling in MVs to have a connected open world, but the doors are much easier to program. That would be a good project after adding that the basic stuff that is missing like sound effects.
I'm glad that the graphics were acceptable. I did everything except the hero sprite by myself for the first time & didn't expect it to look very good. I feel like it could be a lot better, especially the dash upgrade sprite.
Thanks a lot for playing & for your feedback!