Ruins of Blackspire is a Rogue-like Dungeon Crawler with some RTS elements. You try and go through a handcrafted Dungeon and try to reach the end of each level by killing groups of enemies Strategically or you just leave them alive and move past them, everything is up to how you want to approach every situation.
Level up and use the Skilltree to enhance your classes Abilities or get new Spells to outmaneuver your enemies... or just make them "disappear". It really is up to your imagination.
Find and equip items to increase your stats or give you passive/active abilities to wreck even more havoc inside the dungeon.
Increase your stats through a variety of ways to have more chances of reaching the end Alive.
That is the plan anyway. If you look at the screenshots or when you download the game, it is not at the point yet where you can choose your next move with a variety of spells for every encounter. The base features are mostly in but it still needs more polish to be in a state that allows for creativity in how to approach certain situations