I played this game on a pc hooked up to a TV with a mouse and keyboard controls; I like it; it reminds me of Tetris Effect, which I think has an excellent soundtrack and visuals.
I like that you cannot die - if you plan on making it so the player can die - I hope you keep a mode that you can just play and not worry about health.
I like the colour scheme and how you used pink/purple/yellow for enemies and reserved blue for the player.
I wish there were soundfx to hit enemies and signal when a new effect happens. A sound that enhances the music would be cool, rather than the typical "pew pew" or "zap zap."
My favourite thing about it was the triangle companions.
The music reminds me of focus music that you might hear from the focus@will website - it's really good for getting into a flow state.
Keep up the great work! Would love to see the updated version available for mac or web.