Wow, I really like the concept!
You have to play both sides here, and remember not to screw yourself over too much since you'll have to do the opposite on the next run.
I feel like a slow-mo when placing the traps would be better since the scrolling is really fast, or maybe at least being told what trap you'll be able to place before the "evil" run begins, but apart from that loved the gameplay!
Visually, it has its style, I dig the forgotten forest vibe!
Super travail, j'ai beaucoup aimé ! =D