Yeah between by horribly optimized code and post processing effects the game could get a bit laggy, which caused the input lag. It basically loops through all tiles in a 100x100 square around the player every time the dimensions join so no wonder it lags a bit. I found that playing in windowed mode, at a lower resolution, does help a lot with that, which is why I didn't notice until after the build was uploaded lol.
Thanks!