Over all I think this is a decent little game. It’s simple and plays pretty well. The only real issues I had with the game were more minor technicalities, and these technicalities were in the platformer part of the game.
First, the character didn’t always face the direction last moved. For instance, if I walk left and stop moving, the character would then face right. Likewise, if I simply jump in place, the jump is left-facing even though I just right. I get the impression that the idle standing graphic is drawn to face right and the jumping animation is drawn to face left and there’s really no mechanism for storing where the player was last facing.
The other thing I noticed was the character didn’t handle slopes well. If I stop moving on a sloped surface, the character slides down ever so slightly. If I’m running down a slope, there are times the system doesn’t pick up a jump (because, while running down a slope, I’ve flown off the ground a little). I don’t know your code, but I get the feeling you utilized the move_and_slide() call instead of the move_and_slide_with_snap(). The latter call helps keep characters on unusual (aka, sloped) surfaces.
The above observations were really just that, observations. They didn’t really effect my game play much, if at all, but I noticed them and I’m passing that on, lol.
Very nice game over all! Well done!!