Perfect logic game. In some extent it remembers me to the logic game "Slitherink", but with less restrictive rules. A version that includes the rule "There is only one loop" or the rule "There are as many loops are indicated with a specific number (for each level can be different)" would allow to create more difficult levels.
Good idea and good work!
Since I am slightly colour blind, I do have problems with orange and green distinction. What a pity. It would be good, if colours would be configurable.
The idea of this game is quite **good**. However, as anyone her has already posted, there are a couple of things that _lack_: Score, "evolution indicator", a world map, ...
The concept is quite good. However, there could be some bosses at each floor. Moreover, there could be more weapons: primary and secondary. And after buying, you could select them before each level. But, generally it's a nice game.
It's OK. But I would add some features, e.g. goodies that also appear and move like the blue balls, but that can be taken to, e.g. slow down speed, or speed up, or make the balls bigger and smaller, or make them move unpredictably. I would also add some neutral balls, that do not kill the red ball.