to beat boss with 1rst gun: When he shoots lots of red dots at the same time, bullet time. Learn the shot pattern and shoot the small minions while he shoots everywhere. As soon as he stops, berserk close to him when he start moving to deal maximum damage then go away quick, repeat until he starts moving constantly, and make good use of bullet time. if needed keep dodging to regain health before shooting again. basically stay far and berserk when you can.
For Sparta: Build one Laser Tower with max fire rate and upgrade damage but NOT MAX! Leave one and it still get them one-shot. Then fully upgrade missile launcher and use the rest for what you think is good (i suggest wall or gunmen) dont be afraid to use all your ammo and you should be just fine.
just shut up janglin, even if we wont redo it, we had a lot of fun playing it and a good laugh upgrading the game itself. it may not have "replay value", but its original, and thats what counts
the boss aint too hard, i beat it with the first gun. just dodge its attacks and use berserk directly when he doesnt have too much minions. when it shoots,dodge and strafe at the same time so you kill its minions wile it shoots. dodge the big red things very slowly, dont go too fast or youl get stuck. dont go in corners and stay very far, it shoots at point blank. dont worry to stay defensive and get your health back for a while and to use berserk and slowmo in need. just dont screw up.