It's a Match-3 game, with a simple objective: Get 10,000,000 points. The narrative throws in something about escaping a dungeon, but really that's a lame excuse for the mechanics.
Fortunately, the mechanics are where the game shines. The gameplay reminds me of a more strategic version of Chuzzle, which is pretty high praise. You automatically gain points as your avatar keeps moving through the dungeon, but that doesn't continue for long before an obstacle stops your progress and starts whittling away the time you have remaining on your run.
Your matches are used to overcome obstacles and collect resources in order to boost your score. The resources that you collect can be expended at your home base (like, say, a less complicated version of Rogue Legacy) to provide upgrades and bonuses to plow through obstacles more easily, defend yourself against said obstacles, or on the rare occasion just provide a percentage boost to your overall score.
The graphics are deliberately retro, even excessively so, but it definitely has a unified aesthetic. The music and sounds are sufficient, but I found after about 30 minutes of playing and hearing all the tracks, I enjoyed it more with the music off and a different soundtrack in the background.