Fun puzzle idea, I really liked it. Drawing the track and launching the hamster feels great.
Two things I missed:
- The UI could use some styling so the edges of the drawing area are clearer and the field contrasts more with the pieces on it. Right now it's a bit hard to read at a glance.
- It would be cool to see different line types in later levels, for example a slingshot line or a dashed accelerator line.
- Shapes that turn into objects: draw a spiral and it becomes a trampoline, draw a question mark and you get a wheel, that kind of thing. It would fit the drawing mechanic really well.
Nice work, good luck with it!
I'm in the jam too with Second Tail, a 2D platformer about two rats in a cold city: https://para1992.itch.io/second-tail