Glow Stack is a block stacking game where you tap to drop glowing blocks onto a growing tower. Each block slides horizontally and you time your tap to align it with the block below. Overhanging parts are trimmed, making each block narrower if alignment is off. Precise placements build combo multipliers that increase your score. Speed rises every five blocks. When a block misses entirely the game ends and you can view your score, level, combo streak and a leaderboard of your top five results.