Gravlist

It's a decent platformer, a bit short as it took me 30-40 min to beat the base game, but it has an invisible mode and level 38 is literally impossible since it doesn't spawn you at the right place. Confirmed by trying it twice in case it was a one off bug

Generic platformer with gravity manipulation that doesn’t bring anything new. You can jump and change orientation, or "walk on ceiling," so the game is not attempting to change this tried-and-true concept. The only time you may change your gravity is during a jump, and you are not allowed to touch the screen's edges. You will die right away from this. Platforming is simple, although the usual dangers like spikes and falling blocks are included. The momentum is what makes solving levels challenging. If you're falling from a high altitude, it will take a little while longer to start falling the other way because the gravity switch doesn't happen immediately. The worst blocks are those along the borders. Since you can only switch once every jump, either you switch too soon and hit one side of the screen or you switch too late and hit the other. The majority of deaths result from attempting to switch at the perfect time. There are 45 stages and three worlds in the game, each of which is just a new color pattern. To be fair, they do introduce a few new threats, but overall, there aren't many things to be concerned about. The characters you come across on your journey attempt to bring some life to the dead world, but their comments are meaningless because the whole plot is barely there. Protagonist's remarks are likewise insignificant. The speech bubble has a massive default size, which means that most of it is wasted because characters typically only say one or two sentences. However, this is a minor visual nitpicking. The additional "invisibility" mode is not at all enjoyable and borderline unplayable. The difference is that you can only see what is in the area around your character because the rest of the stage is completely dark. You’re basically playing the stage with your eyes closed. Oh, and to make matters worse, there is no way to save your progress in this mode, so you have to complete in one sitting. I advise taking a screenshot of the standard stages if you're truly set on doing them.