This game is super well done. I may have gotten into some sort of bug that kept me from talking to the merchant, the second level, but I'll comment on the level I was able to play (so only level 1).
This game felt good to play. The movement, music and the art matched very well with each other. When I first played it, I didn't look at the help menu until later, and it made it easy to understand that the priority was more about the birds and the balloons versus the rocks. The rocks are kind of hard to move off, but I read a comment somewhere about moving the rocks off in-between levels vs making them a priority so that's helpful (except for when i was struggling and the goblins were being ruthless with the rocks!!)
The only gripe I have is the cursor -- when in the pause menu, the cursor doesn't appear and it's a struggle to know where my mouse is to look at the options.