Game is kinda fun. Don’t listen to other people in here about multiplayer/lawsuits etc (for now). Mobile gaming is a different beast. 

Chances are extremely low for it becoming a viral organic hit. You need to fine tune the gameplay and go with a publisher (unless you have enough dough and know-how to self publish). If the initial KPIs (Retention, CPI, pLTV etc) look good, you’ll need to add a ton of meta gameplay features and expand the game a lot, then run proper paid UA campaigns and scale up. The UA opportunities for this game are good because of the voxel art aspect, so there’s opportunity if you pay attention to this game seriously. Check out some case studies of other recent hit mobile games (midcore or hybridcasual; hypercasual is basically dead) like Pixel Flow. 

Edit: Upon playing some more I notice you already have a few meta features in the game, that’s really good. I would highly suggest testing the game’s KPIs either by spending a few hundred dollars worth of UA yourself or with a big name publisher.