I've really enjoyed Neon Abyss - it's a platformer roguelike with procedurally generated levels, difficulty that scales from reasonable to impossible, and runs

I've really enjoyed Neon Abyss - it's a platformer roguelike with procedurally generated levels, difficulty that scales from reasonable to impossible, and runs take 10-20 minutes so it really respects your time. There's a ton of variety in the items and power ups (and how they interact with each other), so runs end up feeling very different.