It might look colourful and inviting but don't let that fool you, ROTA is going to test your brain with its gravity-defying puzzle mechanics.
As you walk over the edge of each section, you begin to rotate gravity and then use pushing, pulling and rotating mechanics with blocks to get through each stage and solve the puzzles. Gravity affects the blocks you use too, and you need to position them in the right place to get over various obstacles.
It's simple and effective but the developer was pretty creative with the setting to the point that it will keep you interested, while also make you scratch your head a few times with the added challenging of collecting all the gems. If you love puzzle-platformers, it's definitely one you need to take a look at.