Frostline Bubble Shooter

A glacier is creeping down the valley one notch at a time, its face studded with coloured bubbles of frozen meltwater. Break three alike and everything hanging beneath them drops free; hold the ice above the line and the mill at the bottom of the valley keeps turning.

Aim, bounce and pop bubbles before the glacier ceiling sinks to the line. 40 levels with star goals, an endless mode and a daily board.

Drag to aim and release to shoot; the dotted line shows the path through the first wall bounce and the spot where the bubble will settle. On a keyboard the left and right arrows aim, Space shoots and the down arrow swaps. Three or more bubbles of one colour pop, and anything left hanging from nothing falls for double points. Tap the next bubble to swap it in. Every few shots the ceiling drops one row (the counter on the left shows how many shots are left); in endless and daily a new row comes in from the top instead. The run ends when a bubble crosses the dashed line. A level is won by clearing every coloured bubble, and the fewer shots you need, the more stars you earn, up to three. Popping on consecutive shots builds a combo multiplier, and every fourth popping shot in a row earns a bomb or a prism (in the levels, bombs from level 3 and prisms from level 9). A bomb blasts every bubble around it except stone; a prism matches any colour it touches. Stones cannot be popped and fall when what holds them is cut away; bombs frozen in the ice go off when a bubble next to them pops. Clearing level 5 opens hard mode: an endless board with no swapping.