Unfortunately I can't recommend this game. It's not a bad game, particularly in terms of polish. It's finished, it works, it has a proper structure... But it's very, very low on actual content and challenge. The game is easy, gold is utterly meaningless (therefore shops are essentially just an item creation menu, because you know you will ALWAYS be able to buy anything you want at them at all times) and it has no real storyline... though thats normal for this genre at least. You'll learn all your spells within about 10 minutes, your level doesn't really matter (there's no other progression either), items are all boring with no visual effects and they rarely even have extra stats making it a game where you just look at one green number to choose all your gear and by the end i didnt remember even a single item I had on.
The upside is the game is fast and you can finish it within 30m (so sayeth the achievements, I suspect faster is possible) so if you want something to play in short bursts its good for that. But with so little content I find it hard to believe you'd want to play this much. People are mentioning this being a port of a mobile game, if that is true it certainly would suit that format and I'd actually recommend getting it mobile if that's an option instead. It's a game for thumbing at on the bus or in the bathroom, not fullscreen sit-down PC gaming.
So don't buy it. Not unless it receives a big patch. The potential for a really solid game is here if only it was utilised. Then again, it was released days ago so I do hold out some home we see more content coming.