This is a 3D platformer for the Game Boy Mono. I know, that doesn't sound right. 3D on the first game boy? Impossible! Well, it's true, but I'm not talking about some large 3D world that you get to explore. Each of the 100 (!) levels is only as big as one screen. There's not one level that's larger than that. What this means is that each level is like a small puzzle, or just a small platforming challenge. Rather than spend a few minutes a level for 12 levels a la Mario Land, you'll have quick levels that generally take a minute or less, though that's assuming you get through each level on the first try, which is a big assumption. The short levels could have been very annoying and could have seemed too small and empty, but the level design was, for the most part, done well. Some levels are puzzles, making you think about what you'll have to do for a while, and others are about executing an obvious but difficult task. Unfortunately, here's where the problem kicks in. The levels are designed to be tough, but in some cases, tough just becomes frustrating. The last level is a huge example of this, though I don't want to spoil it for you. Expect some levels to be nothing more than jumping through insane amounts of spikes, trying again and again to land a dozen jumps in a row perfectly, to move on. It's a real shame, because if those levels had been taken out, you'd be left with 75 great levels and a much better game. On the plus side, if a level's really frustrating you, you can just skip it. Hitting pause and then hitting up/down allows you pick any level you want, and play from there. It's presumably a trick that the programmer used to test levels, and forgot to take out, but it often comes in handy. Still, it'd have been nice to not have the ultra-frustration levels at all.