It’s Sunday, so the sketchbook is open. Between the roots and the nest, the Skyward Tree climbs through five worlds: the meadow, the woods, the rain, the clouds and the night, two levels each. Nothing in Tirralee is painted ahead of time: the code draws the whole game while you play, every sky included. And every world gets its own small box of paints.
That’s Tirra at the top of this post, hopping past the moon near the top of the Tree, with Lee watching from a ledge.
One recipe, five paint boxes
Every room is painted the same way, from the back to the front. First comes the sky: one color at the top that fades into another at the bottom. Then four clouds, stacked one under another, drift slowly to the right. Each cloud is just three round puffs, and each one drifts a little faster than the one above it.
Next come two rows of hills: a far one with long, lazy waves, and a near one with quicker, lower waves in a darker shade. The blocks, the heroes and the spirits go on top.
A world’s paint box is tiny. It has two colors for the sky, two for the hills, three for the solid blocks and three for the platforms you can jump up through. Some worlds also tint their clouds, and some add one extra touch of their own. That’s all it takes to turn the meadow into the night.
The meadow
The meadow sky starts pale blue at the top and warms to cream near the hills, and the hills are two soft shades of mint green. The clouds are plain white and a little see-through. The blocks are brown earth with a strip of grass along the top, and the platforms are a lighter, sandy brown with lighter grass.
Each block is a darker square with a lighter, rounded one inside it, and its corners only get rounded where there’s open air above or below it. A block with nothing on top of it gets the grassy strip and a thin white shine. And about one block in five gets a small, dark dot, like a pebble.

The woods
In the woods, the sky turns pale green at the top and soft yellow below, and the hills grow deeper and greener. The earth blocks get darker too, and so does the grass on top.
This world’s extra touch is a row of fir trees, spaced evenly along the far hill. Each tree is just two curves that meet in a point, so you get a soft, rounded shape instead of a zigzag. The trees come in slightly different heights.

The rain
The rain sky is gray-blue at the top and fades to almost white, over gray-teal hills. The clouds get thicker here, less see-through than in the meadow. The blocks turn to slate gray-blue stone, and the grass on top becomes a strip of mint-teal.
The extra touch is the drizzle itself: 46 short, thin white streaks, slanting a little as they fall. The rain is drawn behind the blocks, so it never hides a ledge.

The clouds
Up in the clouds, the sky is pink at the top and cream at the bottom, and the hills are gone. In their place is a bank of big, soft clouds: two rows of overlapping round puffs, the back row pale pink and the front row white. The clouds in the sky are almost solid white. The blocks are pale lilac with white tops, and the platforms are nearly white, so up here even the ledges look like they’re made of cloud.

The night
The night sky goes from deep indigo at the top to soft violet at the bottom, over dark indigo hills. The clouds are a faint lilac. The blocks are periwinkle with lavender tops.
The night gets two extra touches. The first is 40 stars, each one twinkling out of step with the others, with every fifth star a little bigger than the rest. They stay out of the lowest part of the sky, so you’ll never find one down among the hills.
The second is the moon, up in the top right corner. It starts out as a full, pale yellow circle. Then a slightly smaller circle in the color of the night sky goes over it, a little up and to the right, and what’s left is a crescent. Look closely at the picture at the top, and you can just make out that second circle.
The sky stays put
When a room is cleared, the Tree’s updraft carries the fledglings up to the next one. During that ride, only the blocks move: the old room slides away and the new one slides in. The sky and the hills stay right where they are, and the clouds just keep on drifting.
The first two levels, the whole meadow, are free to play in your browser at tirralee.com. The full game, all five worlds, is $4.99, paid once. More about the game is on its Tirralee page.



