See the FAQ i just added in the first post. :U

@Ghiita: Aye, the boss was a pushover in the first two demos, but from the third demo and onwards it received a BIG upgrade, namely its autotracking lasers. It still has a weakness, but it's much harder to exploit. :>
Also, the fifth demo will come with yet another upgrade for the boss, which is simply a bit of randomness in the firing of the big lasers. Previously, there was this rhythm that you could follow and thus potentially defeat the boss without taking a hit (it's possible but really really hard), which was due to the constant rate of fire for the big lasers. With a somewhat random interval between firing, you have to depend more on your reflexes to avoid the big lasers, which is notably harder than following a rhythm.

...

Yeah.