I thought I had it all figured out with the springs, but you got me with the enemy variation. I saw you mentioned "boss fight" in a comment - that would be cool.
Yeah I definitely have a few ideas for a boss fight. I just didn't have time/ a chance to do it in this time frame. The original game was going to be "Build your own machines to launch the squirrels" and scope creep started to catch up on me. Hope ya enjoyed it.