Fun game, but I have a few nitpicks about it.
1. Way of the Coward. Not the option itself (I managed to never use it, though it was a close call on some levels), but how it's presented. I understand that the first time it comes up stopping the game is a good idea so the player reads the description and knows what's going on, but all subsequent times it really should just pop up in the background. It breaks flow and on at least one occasion directly caused me to die by coming up right before I hit the A button, causing me to fall instead of Splode.
2. The camera. It was mentioned in the main review, but I still don't know who thought tilting it in certain sections was a good idea. I can only think that they were maybe trying to show more of the level, but it doesn't ever seem to, and instead messes with your perception and leads to several needless deaths. Also, why is it always so zoomed out? It can get pretty hard to see yourself at times because of this.
3. The barrels. I don't know why, but sometimes they send me to one side when I'm aiming for the other. There's probably a reason, but I don't know it so it's pretty annoying.
4. The last boss arena. Who decided that it should be orange on the sides (exacerbating the 'wide view, hard to see yourself' problem) and dark in the middle (making the little helper enemies near impossible to see, helped by the aforementioned camera)? I bet it's the same guy who did the camera. Dammit Gonad, must you always tarnish good design?