I thought this was a very enjoyable game. The thing that made it so cool was how you had no idea what was going to pop up next in it. I lost count of how many different types of levels there were. It was so good how they were all so different. The bunny one was mostly a tribute to Super Mario Bros, and I could find some other big influences elsewhere. I think the bunny level is probably my favorite kind as it is the easiest, lol. You would think a ninja would be able to kill opponents.
I like how it's presented as if it's on an actual game cartridge. Boy, do those things bring back memories. When you said "game cart" in author comments, I thought of the Mario Kart series. Anyway, the music is also extremely impressive and gives off a nice, fun sense. It's also cool to see how they go across dimensions or whatever they are.