honestly great little game. I loved the cutscene at the start and had a lot of fun between waves just circling my crystal spinning my mouse to make my character rock out to the music.
couple of user-friendly upgrades to it might be....
a pause menu - my run was already frantic when i realised i needed to pee and found out i couldnt pause. But it did help with the edge of your seat experience.
a heal to full button - clicking individually for every 10 health is brutal when the max is in the thousands, a little heal to full would make this so much better and mean you didnt have to choose between healing or picking an upgrade if you can afford both
disabling the beam during the night while your picking upgrades - if you implement a heal to full option as suggested above this is not as important but... there were many waves where i started and couldn't fire my beam because it was overloaded due to clicking so much to heal and not realizing i had the narrow beam selected.
perhaps starting the enemies a little further away from the beacon - in the later stages there were a couple of big guys that spawned at the minimum distance from the beacon, because it takes about 5 to 6 seconds to kill one even with lv3 narrow beam, this meant that the other had plenty of time to reach the beacon and decimate its health bar.
im not sure how it happened, or what happened but somehow i flipped your health bar? perhaps because i was healing in chunks of 5 or 6 clicks.?
but overall i had great fun. excelent game. heres my score.