Ibb & Obb is a clever 2D puzzle platformer in which you and a friend (or an online stranger) must work closely together in order to successfully navigate a series of increasingly complex levels. The twist here is that the levels take place across two opposing planes, each with their own gravitational pull. The two playable protagonists – Ibb and Obb – need to alternate between these two planes via portals, assisting one another with tricky jumps and lethal enemies, all the while collecting as many points as possible from their fallen foes.

What's immediately apparent when booting the game up for the first time is just how pretty the visuals are. Granted, they're far from being technically impressive, but the abstract shapes, smooth gradients and juxtaposition of varying colours make for an incredibly pleasant looking game. In addition to this, the music is wonderfully relaxing, so the combination of the visuals and sound design brings great balance to the immense frustration you're likely to feel during the more complex puzzles.

Despite its simplistic premise, Ibb & Obb injects heaps of creativity into its puzzles right from the start. A lot of it is based on momentum – so much like Valve's classic FPS Portal, you'll need to jump through various portals on the ground, alternating between the two opposing planes, in order to reach higher ledges. Of course, being a cooperative experience, you need to keep in mind that both players need to complete the puzzles in order to progress. It may be that you can quite easily reach a ledge from where you're standing, but your friend on the opposite plane can't, so you'll need to stop and assess the situation, as many puzzles may not be as simple as they initially appear. Some portals are even colour coded, so only one particular player can pass through them.

Littered throughout the levels are spiked blobs that will cause Ibb and Obb to both explode if just one player happens to touch them. Thankfully, they can be easily dispatched – on the opposing plane to which the blob is situated, a white semicircle protrudes from the ground right below (or above) the blob. If you're on the same plane as the semicircle, you can jump on it, thus exploding the enemy. Collectable points will then erupt from the fallen enemy for you to pick up, and at the end of each level, these are tallied up to give you a total out of the maximum available to collect.

Playing Ibb & Obb on your own is an absolute no-go; it just won't work. But get together with a friend – preferably via local play – and you'll have an absolute blast with this game. Some of the puzzles can be excruciatingly challenging at first, but it's immensely satisfying when you finally figure out how to beat it together. It's yet another fine co-op title to add to the Switch's library.