Yes, it's a fungeoid (https://esolangs.org/wiki/Fungeoid), using a hexagonal grid. Ignoring dimensionality, non-square fungeoids are not novel e.g. hyperfunge (https://esolangs.org/wiki/Hyperfunge) uses pentagonal cells (it also uses a hypergrid, so each cell is surrounded by 20, 4 at each corner).