The game is fun, but the problem lies in its level design, mechanics and difficulty.
The main mechanic of this game is to collect as many coins as possible, and the game encourages the player to do this by putting things in the levels such as golden rings that give you coins for a short time for defeating enemies, or golden counterparts of the mushroom and the fire flower, which serve to grab more coins.
The golden flower is too broken, they give you coins for everything you do with that power up, whether it's killing an enemy or shooting blocks.
The problem with this is that the only thing the coins do is make the game even easier, because by grabbing 100 coins, as is customary in Mario games, you win a life, now imagine that in the levels there are much more than 100 coins , results in a game with an extremely easy difficulty, so much so that I personally never saw the game over screen.
The only thing the level design does is increase this problem, in many they put sections where there are too many bricks, obviously so that you can break them with the golden flower and earn more coins. Also, the level design in this game is truly uninspired, it doesn't try anything new.
The soundtrack is exactly the same as New Super Mario Bros Wii, just with more "gah", which can be annoying at times.

The game is very mediocre and does not come close to the Wii and DS releases.

It's an absurdly fun mod because of the amount of crazy things you can do.
I literally completed it with no stars.
The shotgun gives Mario new moves, such as having a higher jump, being able to kill enemies more easily from a distance, or aiming at whatever you want to shoot.

I recommend it to anyone who likes Super Mario 64