Hi there! Thanks a lot for letting me know about the performance issues. The cell in the middle is a low poly sphere. The enemies are all single quad/tri. I do have a whole bunch of shaders running so it could be those? I'm pretty new to game dev and shaders so I'm sure I've done many things that are not optimal.
By any chance can you share any info about your setup? For example which browser your using and any relevant computer specs? If not, no worries. Thanks again for the heads up and for attempting to play my game!