Game seems to have different speeds in at least when comparing iOS and PC versions of the game and seems like there is nothing to be done to it. 
I timed how much it takes for both of them to finish 1-1 and on iOS you complete 1-1 in like 2s 733ms. But on PC 1-1 takes 3s 960ms to finish. As you can see it's one second difference in completing one level. And on 1-2 it seems that iOS is like 2,5 seconds faster than PC. So what I'm suggesting here is that make PC (and Android?) and iOS into own categories since those two can't be really compared against each other.

Hey, thank you for bringing this to my attention. Can you make a video comparing iOS and PC side by side or send me the videos of iOS and PC in the same level? Send via my discord, Yell0wRat#6313

https://youtu.be/U29ekl3y7l8 <- link for comparison
Upper video is by me on PC and under that is video footage of world 1 speedrun on iOS.

I just noticed that this issue might just occur on my device since halfacookie didn't have this issue. Also I found out that I can speed up my game on PC by just alt tabbing enough and then it runs faster??

Okay so I timed it when Jack starts to move and ends when the complete screen is shown. For PC, 3.95 seconds and for iOS it is 2.817 seconds for level 1. iOS is 0.71 times faster than PC I think? It definitely adds up over the run so I'll do a sub category split for mobile and PC soon. Thank you for bringing this to my attention btw.

https://youtu.be/oy9oZpbJ908
Made some further investigation to the game.

Discovered that the game runs on my PC at 21 fps, but when I open something in the background (in this example Bluestacks) it runs magically then at 30 fps and I assume that this is the original speed where it should run. 

You can also see from the clip that I used alt+tab to make the game run faster. In example when Bluestacks wasn't running on the background I could still use this glitch to make the game run at 43 fps. And when the Bluestacks was running on the background I could get it up to 60 fps and the speed was increased by a lot.

Finishing 1-1 on
60 fps: 1s 417ms
43 fps: 1s 983ms
30 fps: 2s 817ms
21 fps: 3s 950ms

This just proves that the PC version is broken or not optimized or my PC is just different.

That is very interesting, maybe a any% and glitchless category may exist for pc? If alt+tabbing is faster than what I did in world 1 then I'll make another sub split category for it, there might be some glitches on mobile but most likely not.

I'd like to submit a run but on ps4, does that count as pc or is it simply not allowed?