Just tried your game. Battles seemed really random, but it was lot of fun :D
Here are some issues i found so far:
Game started completely black and for some reason i didnt think of pressing space.
Maybe there could be some text telling to press space.
I was able to bypass barricades by moving around this lake.
I rolled in ufo and got stuck inside walls.
Having all interactions happen from same button could create some problems. For example when i had to carry egg. I could accidentally just throw egg instead of talking to npc.
Just defeated bird man. I will continue game and give more feedback once i finish it. :)