This game reminds me of Tower of the Sorcerer. Monsters, status system, items, the Altar, yellow/blue keys... Maybe it's the game who inspired this one? It's very likely you played TotS before, or a similar one. You should say that, otherwise people that know TotS may think you just copying an older and fairly unknown game (I am not implying that. Consider a suggestion ok?)
Also, not a roguelike. The combat mechanics itself disqualifies. But since it's funny to remember the old times, i give it a 3.5