I am looking for a couple of years old then-shareware Windows game, a
2D space shooter with psychedelic graphics and music as its main
theme. The enemies are of abstract triangular shape, and you are a
small spaceship that has to shoot them to smaller and smaller pieces.
When they explode, a wave of multicolored psychedelic  explosions
resonate. I've searched quite a lot but can't find it. I used to play
it a long time ago and it was a great game, but i unfortunately forgot
its name and website.. Please help.

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Clarification of Question by cyraq-ga on 29 Oct 2006 09:43 PST

By psychedelic I mean oddly multicolored and shaped. The music and
sounds are also very odd. I remember the background to be black. The
game runs in full-screen mode.

Are you thinking of http://www.spheresofchaos.com/ ?