No test network yet?
No. And because it's written from scratch, with no general scheme that could be borrowed from other sources, it takes time. Surely more than 2 months that elapsed since you last asked me about the same. While we wrote prototype skeleton clients already it's still long way to have them publishable. But we are on schedule still.
I'll notify you when testnet is ready to play and hack, I'm glad that you are looking for it.
Yes, I'm very interested in lattice or tangle type of crypto. That's why I'm heavily into IOTA, Byteball and Raiblocks. I wonder what differentiates BitLattice from the ones I mentioned since you said you're starting from scratch.
First - it's not a blockchain. Second - it has a metric structure. Most of differences I already mentioned above. Please be more specific.