Yeaah it's a shame we didn't have time to add colliders and such on mother-tree ;( It would be a great touch to the game :)
I think it's interesting that you mention how it's annoying to die and restart - I think maybe it would be less punishing to start from the wave you lost on. We will take this into consideration when we further develop our game :)
We're also sadly aware of the jankiness and will definetly improve that :D
Thanks for your review, much appreciated! :D