IEUMSAE

Place hex blocks beside your city. Matching colours join, and joined blocks grow towers of light.

Portals open and spread pits. A block with more faces on a pit than joins collapses into the void.

Blocks joined on three faces or more set and never collapse. Set blocks on two sides of a portal close it. Every 5 turns you get a white block that turns a pit back into ground. Reach a ◇ to start a new centre there.

Each block placed uses one from your deck, and setting blocks adds more. The game ends when blocks or open spaces run out. Your score is the turns you survived.

Controls: drag to place, tap to rotate, drag the board to pan, scroll or pinch to zoom. Hold Tiles (or T) to see the tiles only.

Desktop and mobile browsers, portrait.