You scared me there for a second, Pilou. But that's not a "paint app", but some fun pseudo 3d (2.5d) particle branching engine with some rendering options. Cute idea, I can totally see this being fun, but nothing like what I'm doing. Forgive me, but don't place an ad for them here, though, please! Plenty of distracting stuff everywhere, but right here this is like self-destruction, you know. I don't have the confidence, yet, to send people into other genres of software, assuming they'd continue to look at what I'm offering.
...but maybe it will come.