I thought when I started this game that it would be a five minute platformer due to the controls and the appearance of the opening animation. I was pleasantly surprised by how well the controls were implemented and the depth of the upgrades, secret areas, and humor. Sadly, as much as I liked this game, there were some downsides that I think could be overcome in another production, if you're so inspired to create on.
To begin with, there wasn't much of a plot. This isn't necessarily a killing point since some of my favorite games lack any story at all. Secondly, the speed of the respawn made me think that the difficulty would be much higher. While the environmental deaths happened quite often for me, I found them to be an annoyance rather than a hurdle as they didn't respawn the enemies when I died nor did it reduce my health. This made the Bossfights with environmental kills (such as the murderous mountain) a little confusing. I could be killed many times by the spinning blades, but unless I got hit by the mountain I wouldn't actually lose any health. Nor would the environmental deaths it re-fill the health of the boss... Maybe you overlooked this?
There's a lot of distractions for me right now, so i can't make a better review, so I'll wrap this up. In short, I liked that game, but it could have been a little more difficult without affecting the entertainment in a negative way.