After Secret_Tunnel and Zero recommended this game (knowing my love of Roguelikes), I checked out Giant Bomb's Quick Look (see below), and I was pretty much sold. I've played it for a couple of hours now, and I've made to the second stage a couple of times. The controls are incredibly unique, so it feels very novel. It even messed around with my brain when I tried to use the mousepad afterward. I almost felt like I had to to balance out my finger swipes. Tetris Syndrome!
The presentation is really nice. The HD Rumble effect is subtle, but... effective. The music is kind of soothing and maddening, just like the game itself. Although the graphical style didn't seem like my bag at first, it's kind of growing on me. It's clean and sharp, and the framerate is super-smooth, which is always the top priority for me. Tumbleseed is also available on Steam and PS4, but the developers seemed to have ensured that the Switch version wasn't inferior.
Quick summary of the gameplay: You progress upwards through a randomly generated 'mountain' by rolling your seed around with a freely moveable platform. You can drop or raise the two ends of the platform with the left and right analog sticks. The indirect control method is what really gives the game its own identity. There are holes all over the place, various (nasty!) enemies crawling around, and various powers and gadgets that you can use to attempt to survive. And it's more like Spelunky than Rogue Legacy, in that not much seems to carry over from session to session. So the only way you can significantly improve your performance is by actually getting better at the game.
The game design is very clever, with the different powers and the main economy of crystals which you can collect and/or farm. It has a tight, fun risk/reward/strategy loop. Most importantly, since it plays like a classic arcade-style game, Tumbleseed is perfect for killing time in portable mode. And the idiosyncratic controls make it a game that you can genuinely feel yourself getting better at. There's so much headroom for finessing the seed.
It's still hard as balls, though. (And I still want the option to try tilt control.)
URL to share (right click and copy)