Ooh, I'll have to give your game a shot soon! I haven't seen many other projects using a mouse either. I agree audio would help a lot, between time constraints and my own lack of experience with it I decided to focus on other things. It's definitely something I want to include the next time I do a jam!
And if you want a hint for that level, try putting some momentum into your cursor before you let it go ;)
The pointer is a bit of a mess, it's a RigidBody2d with a dynamically offset area2d for collision detection in normal cursor mode. In hindsight, I think it would be better to swap between a KinematicBody and a RigidBody when it changes modes for a number of complicated reasons, and I plan to try that out and release an updated build after the jam. As for the levels, they're pretty simple, walls are StaticBodies and just about everything else is an Area2d. Then I just used signals and AnimationPlayers to make everything work, and slapped a level graphic sprite on top!
