Each level is mostly self-enclosed and nothing except special powers (tarot cards, which are unlocked by completing objectives during each level) are transferred.
The game is inspired by Doom, Serious Sam and Quake.
Each level (except the final stage levels) is divided into multiple subsections. An area ''closes'' each time you walk into a red circle, a lot of enemies appear and spawn, you defeat them and then advance to the next part. The levels get longer the farther you get into the game.
The boss stages are pretty cool and probably the best part of the game.
The lack of enemy and weapon variety can make the game boring around the halfway point, which is what happened in my case.
The metal tracks were enjoyable, but a bit on the generic side.
Has its good parts, but could've been much better.