Could it be MinuteQuest or MinuteDungeon by rpg-to-go?
Thank you for the suggestion! Unfortunately, it's not MinuteQuest or MinuteDungeon. Those games have a completely different gameplay where the character just walks in a straight line from left to right.
The game I'm looking for has a strict 3x3 grid map where rooms and enemies are locked via a fast-rotating roulette/slot system, and combat is fully timing-based with numbers flashing in identical boxes. Thanks for trying to help though!
MinuteDungeon. Those games have a completely different gameplay where the character just walks in a straight line from left to right.