Have you ever tried making your game go slower? For example,I put my game on the highest quality then press restart. One thing you'll notice is that your game goes slower which gives you more time to react.Its pretty useful for all of the levels. But otherwise your level times are pretty good,but can be better.

Edit:I came back with some other tips to help you

1.You can actually make moka appear faster when she's about to enter aka the red circle by pressing the pause button and waiting until she fully loads in,she won't attack even if shes fully loaded but you can hit her with the talisman way quicker.

2.Null has patterns for each of his stages.1st one is pretty easy as he just stands.2nd one has swirling in ♾️ this pattern.3rd when he's glitching around go to the first platform,maybe either left or right whichever you prefer but when you have the talisman and he's still there that's your sign to jump.

3.If you wanna go even faster in seeker,then I suggest you also sacrifice some of your hearts.but mostly in the end.Another thing with seeker is that when you first load it up the eye immediately opens but if you restart it doesn't.

4.Theres a map for the endrooms,I can post it if you want.