The nanorobots are adorable. The map is a little too big. There is a noticeable lag after a while possibly due to memory leak.
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The lag is due to a bug where the newly created nanobot glitch into each other causing them to gain a lot of speed, to glitch into more bots and to spin fast around the crosshair. The collision checks from all the glitched bots causes the lag. The map could be more compact I agree.
Thanks for the feedback.