I love the gloomy atmosphere you created for the frog jam! I found a bug where it was a section with two big frog where they shoot the rocks from their back. They ran into each other and stuck and I physically couldn't get through without dying. I will say, two features that would make your game more enjoyable would be to have different heights for jumping (longer hold == higher jump, vice versa). And also a more forgiving hitbox. Even if you'd like the game to be hard, a smaller hitbox is generally something platformers go by since the player feels more in control (and note you can still make the game really difficult i.e. Celeste).
I thought this was a clever take on the theme! I wouldn't expect a platformer like this to be mouse only!