Simple concept with perfect execution
It may seem like a small thing, but the simple sound effect of the lock I think really elevates the game feel, awesome job, the safe cracking felt so satisfying!
The foundation very good, I think you could totally add upon this in the future! I'm sure more rougelike elements like modular buffs/debuffs or maybe a timer could make for a really cool full fledged game!
Keep going, this rocked!