Fez is finally out, and only 3 years late too.

http://polytroncorporation.com/61-2

Buggy as hell, but extremely good so far.

Wait... let me get this straight... There is no real point to the game? No goal, no conflict. You just go around "exploring" and finding treasure. Which is pretty pointless in itself since you have nothing to use any gain from said treasure towards...

Other than concept, why should I be interested?

When you have (roughly) half the treasure you can get the first ending, unlock new game+ mode (with all your progress plus a new ability), at which point you can get the remaining treasure, which (presumably) allows you to unlock the final door, probably containing a big level, and get the real ending.

The game is also full of seriously challenging puzzles.

Reminds me of Super Paper Mario mixed with Minecraft.

I regret purchasing this.

Not because it's not awesome; but because I will never solve all these puzzles (It's not THAT compelling, sorry). So even though it only cost $10, I feel like I am wasting my money by not 'finishing' it.

The game is also full of seriously challenging puzzles.