Hollow End

In Hollow End you’ll start in a sanctuary where you can pick one of two characters with different abilities, unlocking the rest of the characters as you play the game. There will be 3 biomes containing 5-7 levels each. Your goal is to clear out all the enemies at that level so that you can reach the next one. For each level you complete, you get an item tailored to the type of level you entered. At the end of each biome, there will be a simple boss that gives you keys on top of an item, with enough keys you can unlock a new character back at the sanctuary.