Interesting little game! Bit tricky to figure out how everything worked at first: for example, I had a lot of confusion with health, where I didn't realize how I was recovering health, and I didn't even realize I was getting hurt when I ran into different colored blocks because the explosion seemed so 'positive' in its satisfying feedback, haha. But once I figured it out, I appreciated the whole strategy of trying to minimize your routes effect on the map so as not to block yourself out when you switch colors: try to not create too many new blocks, try to use the gray zone to eliminate blocks, if you have to take a hit try to take as many blocks out when you can, and so on, and in general just try to improvise all that when going for the randomly appearing goals. Can be a real brain-teaser!
Having said that, though, it's not quite got enough meat on its bones to keep my attention for very long: at the end of the day, it wasn't the most exciting game, and I felt like it was a cool concept, but maybe not iterated upon enough to find the best form of it. For example, maybe it would be best if it was a puzzler with definite solutions instead of the random nature it currently is. I'm wondering if it would be better if it had some sort of Tetris-style preview of where the objective will be in the following round so you can try to plan it out a bit better, since as much as I tried to plan things out, it always felt like there was only so much I can do and then it was just up to luck. Of course, that could just be me in general not having the patience for this type of game, haha. Solid for what it is and how fast it was made, though!