On first glance, you might think this is basically Dome Keeper, but vertical instead of horizontal. As a fan of the first game, I'd go as far as saying Wall World does some stuff even better than the game it was inspired on.

First off: there's a permanent progression system with upgrades that carry over your runs. They're surprisingly deep and varied. You find them scattered around the mines and use bits you earn from breaking blocks. It's fun to start weak and see you surviving more in each subsequent run. In the end, you're basically clearing mines in seconds.

Then there's also different guns and equipment for you to choose and upgrade. While there isn't too much enemy variety, they do a good job of keeping you on your toes. The ending is a bit underwhelming and you feel as if there could be more content overall (biomes, for example).

Beware: Wall World is one of those titles I like to call "gaming crack". Extremely addictive and grindy in a good way. Control scheme is a little wonky on console, but that's more of a porting issue than a dev oversight.