This is very cute and a lot of fun, but after playing other co-op platformers (like Battleblock Theater), this one kind of sucks unless you're really good at platformers.

There are numerous puzzles where the challenging half of the puzzle is required to be completed by one or the other character. So if your platforming skill isn't up to par with your partner's, there will be times when they just have to sit there and watch you die over and over and over and over again. If you're playing online, there's nothing they can do to help you. They can't step into your character's areas, and you can't temporarily switch characters (or pass the controller) for them to bypass the area you're stuck on.

Unlike Battleblock Theater (I'm sorry I'm comparing them, but my experience was so wildly different. BT has been hours of nonstop hilarious fun. Ibb & Obb was fun for a little while and devolved into frustration and ragequitting.), you can't just skip over difficult sections by blowing yourself up and respawning next to your partner, or by letting your partner do the legwork by tossing you/pushing down a block for you to run across, etc. You're required to have the same amount of challenge and skill. So if you don't... then you're just not going to have a good time.

If you are really good at platformers and you have a friend who is also equally good at platformers, and you want a challenge, you'll have fun with this. But if you're looking for a super fun game to play with anyone who isn't a hardcore gamer... :/ This game is going to get frustrating after just a handful of levels.

(Like, somehow it being co-op makes it worse. Because the shared fun experience grinds to a hault, and it's all your fault because you aren't good enough to get past an obstacle. Your friend is, and they're trying to tell you how to do it, but you just... lack the skills. Which is just.. really disheartening when you and a friend are just trying to have some fun.)