Some tweaks.

As mentioned in the last post, enemy speed and spawn rate have changed for a better use of power-ups, and now the dual-color power-up is working. When you destroy a dual-colored rhomboid you get a white shot power-up, and when fired, for the next 6 seconds (or until you get another power-up) the "ship" and shots colors will be yellow, cyan and magenta instead of red, green, blue.

Difficulty-wise, right now it's decreasing the spawn rate slowly. (Starts at 1.5 secs, with a 1 sec cap). What I've planned is that when you reach this spawn timer cap, there will be an increase of the overall enemy movement speed. (Right now, 40 pixels/s, and probably it'll be capped at 80 pixels/s). Then, the next thing would be the rhomboid ratio (Right now every 12th, and it will be every 20th when capped). If you're still alive, then the next value changed will be the dual-colored ratio. 

I'll test a bit more with these values and make some gui differences between the 2 power-ups, and then I'll start with the bosses fights. Not so much thought about it right now, but I think there would be a boss fight every 100 blocks. When in a boss fight, there won't be any other blocks spawn. Bosses will be multi-parted, and to damage those parts you'll need to do some stuff, not just attack with the right color.

Oh, and sorry, there's no sound in this video. I forgot to activate the sound input on obs... and I was lazy to do another video