First things first, I have to say that this game is an unofficial one, made by a single person and without any money coming from it, therefore, I want to take easy on it, but I can't. The visuals of the game are awesome, especially when we think about fan games. There is a lack of Mario fan games that take place in a 3D environment, and that is a major feature the developer achieved. That said, I must say that the music and the character design are also top notch.
Now, for the bad part. The game has problems with hit detection (2D characters with a 3D hitbox don't help it), bad enemy placement and AI, difficult jumps which get even harder because of perspective problems, platforms that move too fast and the game is very difficult overall. Also, even when playing on a very high end PC, the game chugs at parts, going below 30 FPS and, all of a sudden, it goes up to 60 FPS, which cause strangeness and may cause the player to miss a platform or to get attacked.
The game is also short, but has lengthy levels, having four worlds to take on.
That aside, the bosses are creative and the new power ups are nice, especially the "dandelion plant" one, which makes jumping so much fun.
Overall, it's a game that deserves to be played because of what it does as a fan game and its style, but has some flaws that will likely happen to disturb the playthrough.
Pros: visuals, sound, power ups, bosses, concept
Cons: performance issues, bad enemy placement, unfair difficulty, hit detection problems.