Polygons march the lattice seams toward your core. Tile edge-matched tower polygons onto the grid:
shared edges of the same colour lock together and each match grants +25% damage.
1/2/3 pick shape · R spin edges · tap tile / upgrade ·
X sell · S/SPACE next wave early for bonus ¤.
Complete a perfect tessellation ring — a tile matched on all four edges — and the lattice purges every polygon on the seams.