Reducing Lag (Need more letters)

My game-
This game has a lot of lag when you go in between levels, I wanted the world to be large, but it lags a lot. Is there any way to reduce lag, I’ve made changes such as activating animations only when they’re on screen.

What computer are you running it on. Give me the exact purchase name.

It seemed to be working fine for me it could just be your computer.

That’s What I thought thanks.