Hi guys, So I found out that when you run, switch to a different cat and then your in the air with the selected cat(while holding the same direction you jumped off) you can jump again but in midair. You can even do it again by switching to another cat. There are of course some uses to it. Here they are:

1-2: It's possible to get the third bell without Olli's cape.

1-H:You can get the first bell early and save a bell.

1-7:Get the second bell early.

These are all the ones I could find speedrun wise on world 1, let me know if you find anymore uses with this glitch.

Can you do this with any amount of consistency? I’ve been trying for an hour or 2 and I can basically never get the double jump necessary for 1-2. Any suggestions?

There is a way to tell which window in the jump you can jump in the air. After you jump, if you switch to another cat without holding the screen and you here a dash sound, that's the window you can jump on when jumping.

Hope this helps.