Such a cool idea: Splatoon with loops (actually, reminds me of Crash Bash and some minigames there as well) :D I especially like how you can engage the boost to catch your trail before it extinguishes, giving you a larger loop. Not sure if I've missed it, but I think the game would benefit from some upgrades or some objects that could affect your gameplay. For instance, circle a barrel and it explodes, launching drops of your color across the level, etc.
The enemy CPU completely gave up in my match, basically just chilling in the corner. :D
All in all: great idea with great potential for a fun couch game. Well done!