I've played and enjoyed two of the games.
Sessions of Vertical Drop Heroes may suffer from permanent upgrades, but have some decent risk/reward due to gravity, the unknown depths and little clue if you'll be able to get back up.
A Wizard's Lizard has optional permanent unlocks, but sessions turn into a more general action game with the possibility of avoiding dead end paths.
Outside of the bundle, I'd recommend Sproggiwood. It's more of an actual, turn-based rogue-like. There are permanent upgrades, but they can be toggled. Even with them, the risk/reward leveling and tactical decisions are retained.
For action, I'm currently enjoying Tallowmere as a dungeon crawling platformer with levels and loot juggling without permanent upgrades.