I like the character design. The rest of the artwork is obviously very temporary. The ladder actually wan't obvious at first to me I though it was just part of the wall and was stuck for a bit. Basic jumping and shooting feel ok but the slide jump is a bit tricky to execute and can be a bit frustrating when missed since you will have to do a lot of retracing your steps. There is no indication in the game what the powerups are so you just have to guess. I guessed correctly based on the controls listed that the first powerup was dash but I am actually not sure what the second one gave me (if it was even a powerup? It was a godot icon...)
Also used ldtk importer for my game, it was actually pretty nice to work with. And ldtk itself is great.