A conceptually amusing platformer with mixed execution. Playing part of the first world is worth the time; probably not worth buying or playing through the whole thing. I played around 45 minutes to get 100% completion.
You start at the end, defeating the end boss and running away with the princess. Then you go in reverse, from right to left, bouncing off enemies’ heads to wake them back up, returning coins, and catching fireballs. That’s the “conceptually amusing,” a reversed platformer. Not all the coins were collected nor all the enemies stomped on the run through the game you are unwinding, so the challenge is frequently to collect particular coins and avoid bouncing off certain enemies.
This is entertaining for a small number of levels. There are 100 levels. Most of the levels are very short. A perfect run through the game would take about 15 minutes. That is helpful, because stomping an enemy you were not supposed to creates a “paradox,” start over. Some levels are a couple of easy jumps, and you will never see them again. Others require pixel-perfect jumping or timing that you need to memorize because you need to react to some things before they come on screen.
That is, the jump is a fixed height and width, so if you need to make three jumps in a row, you need to know exactly where to start the third one so you can start the first one at the right spot, and the third one will be off-screen. That’s bad design. Many other design decisions are good. For example, when a new enemy is introduced, you have an entire level that is nothing but dodging that attack pattern with no complications, more or less just showing you how this enemy moves.
One design decision initially annoyed me, but I decided it was a good thing. You get a perfect score on a map by beating it with no deaths or paradoxes. You cannot start over in the event of death or paradox, or perhaps you could by quitting to menu, but there was no quick restart I saw. The level restarts automatically upon paradox, and it keeps doing so until you get the whole level perfect in a single run-through. Then you get your score. If you want your perfect score, you need to do that, then start over and do it without failing. In effect, you need to be able to beat the level perfectly twice in a row. I like that. Once can be a fluke (and perfect on the first try still counts); if you just failed it 10 times in a row to get it once, you need to do it again to demonstrate that you actually know what you’re doing. It reminds me of a nice bit in Ender’s Game when Ender has his troops repeat a maneuver three times to prove to themselves that they have mastered it (but only three to avoid having it become a repetitive drill).