I liked Rogue Legacy, but it's kind of short. Took me 25 hours to beat it through New Game++ and I sucked pretty bad at it.
Felt like a combination of Metroidvania (circa SNES) and Megaman. There were some aspects to it that I thought could make the game deeper and more fun if they were expanded (I would have liked to have seen, for example, a greater variety of metroid-esque abilities and megaman-esque special attacks, and more exploration) but overall I was satisfied.
I forget how much I paid for it, though. I think it was 75% off at the time.
I played Rogue Legacy with a controller. Super enjoyable. The problem is that there's a hurdle you have to get over after a certain period of time. I'm not sure what it was about it, but I just wasn't getting enough money! And then, I finally beat the hurdle, and lo and behold, I can start buying things again!
I had that problem too, and I tried to fight it by buying Gold Gain Up, but I think that was a bad idea because each upgrade you buy increases the cost of everything else, and Gold Gain Up is very expensive. I basically wasted a lot of lives because I couldn't buy the next tier of GGU. I recommend instead unlocking better classes like the Shinobi and trying to complete "deeper" sections of the castle, like the forest and tower, instead of trying to be meticulous in clearing every room looking for chests.
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As far as that current Greenlight sale, I guess I will get Gnomoria, despite how much I prefer DF (or more accurately, the Masterwork mod). Anyone have other suggestions? I don't want to have to investigate everything but it's hard to go through the list and guess on what might be good based purely on price and a thumbnail.