Right-click and Play.
I like the fact that the graphics don't slow down the game at all. The absence of sound effects does not bother me because I'm listening to my own music. The only problem I found was that when I got to level 130, the super enemies would get trapped by my inverter beams and even my row of semi-upgraded fission lasers couldn't take down one of them. I ended up selling everything to allocate all my firepower in one place. Level 131 was no contest.
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