It's Diablo made in the Starcraft engine. It's horrendously limited in it's functionality and fluidity as a result. Graphics are 'awful' because it uses assets that are provided be blizzard (warcraft 3, wow, and d3 models) or assets the author made himself (raw stripping of the d2 terrain). Balance in't great either. THe difficulty spike becomes tremendous each map, and healing items and extremely sparse. Another nitpick is the fact that map to map transition does not use the trigger that allows another map to be loaded, although I don't know if that is available in SC2 like it was in Brood War or Warcraft 3. So after you finish each map, you're forced to exit the map, and continue your character on the next map, which takes ages to load. Author isn't a native English speaker either, and it shows.
Regardless, you can tell the amount of effort the author made to try and make this work as best as he can. Even if it doesn't play out well, trying to create a different kind of game within a game is always challenging. It's frustrating to play right now, so it may be best to give it times to grow and get some refinement and fixes.
The Curse of Tristram
one major gripe I have for the game is the 0 mana rejen so your forced to buy pots to refill your mana its glaring and very annoying