Mekorama is a gorgeous Captain Toad-like puzzler by the maker of underrated gem Odd Bot Out
The Computer and the Brain

First of all, if you haven't played Odd Bot Out, I'd recommend that you check it out right now. It's a slick puzzler with a lovely theme that feels a bit like a robotic version of Portal's test chambers.
Its creator, Martin Magni, is back with another game using the same characters and general art style but this time, it's in 3D. In the first trailer posted below, it looks inspired by Captain Toad, a Wii-U game by Nintendo.

The game should launch with fifty of these dioramas, with a level editor built in.
I'm quite looking forward to it and if you'd like to test it now, you can check this thread to get into the beta.