209 small mid or high
I think it is unbeatable. not an experimental level. I have a feeling someone might be able to beat it but on hard?
Interesting map, but it's entirely possible - I chose large/high as it seemed to be the hardest of them (small/high does have a surface gateway, but the number of drones on both gateways caps out at such a small number, the first gateway can easily be distracted by the LS indefinitely, and the second gateway isn't very threatening)
I picked up the 2 gems on the left first of course, and then I built a repulsor and 4 blasters to quickly nullify the emitter (started building the nullifier as soon as the field turned down):
From there I picked up the red gem under the emitter and built *lots* of shields - if you're fast you can do this before the drones are able to break out, I filled up almost the entire chamber the first emitter was in with shields and kept my blasters behind a few rows of them, and put my repulsor in position. After the first wave of drones is gone the 4 blasters will be able to hold off the rest easily enough, and you can build up reactors and play fairly normally from there.