When there's no such thing as jumping, there's reversed gravity.
The objective of this game is to find your friends after your ship was transported to an unknown dimension. You can free roam around the dimension and find them in any order you want. The dimension has no end but only spans for so long, when you reach the top, you end up at the bottom and vice-versa.
From spikes to big red blobs chasing you, this game, can be very unforgiving at times. A little like Super Hexagon, there is a minigame called Gravitron (and super) in which you must survive countless waves of blocks moving towards you. And if you thought this was hard, there are also Time Trials, No-death Mode, Flip Mode and even player levels made by the community.
In my opinion, once you get the hang of it, and that AWESOME soundtrack, (10/10 guys) the game will become, very, very fun and challenging. If you speed-run, it can be quite short though (I did 4 hours or-though people can do much faster) so it's not a game for people who like to sit there for hours unless you absolutely suck. So my rating, is 10/10.
PS. I dare you to do Veni, Vidi, Vici! in no-death mode...