It's good but it's a bit overpriced. You get 2 characters and a survival mode. The survival mode, the reason I bought this, is fun but once you figure out how it works, it loses a lot of the magic.

You play in static stages. There's a wide variety of backgrounds but most the levels are basically the same. There's fun power ups and it seems like everything is random. It almost feels like a pseudo-roguelike. It's a lot of fun at first.

However, if you want to collect crystals you have to spend a long time playing. It also seems like you can only collect the crystals in order so if you die before getting the last one, be prepared to collect all the other ones first. It's also very inconsistent how many crystal fragments you get. Sometimes you'll get one or two, if that, on a stage. Sometimes you'll get like 20 to 30 on a stage. This means you can play a long time without making any progress.

The fact that the enemies are random means you can start out with several stages in a row of harder enemies. Though the game tries to balance this by making the game harder every crystal you collect so it feels like there is a sense of progression, even if the difficulty is inconsistent.

It's good but it feels under baked.