Hey dude, thanks so much for the support!
I think I'll keep the spear moving you forwards, but I'll make some changes to make it less frustrating. I quite like your solution of large objects knocking you back but not hurting when attacking, I'll try that one out. The little caterpillars are intentionally hard to see, but I understand how that would seem unfair. And finally, the boss is set for a major overhaul, the fight's pretty slow, frustrating, and worst of all, doesn't really engage with the main mechanic (morph).
So thanks again for playing, and for the kind tip (that's a first for me, so pretty exciting!)