Sea plane

Profile

Attribute	Value
World	Sea, #4 of 25
Unlocked by	clearing the previous world
Launch power	22, +0.4 per Slingshot level
Top speed (cruise)	150 km/h
Income multiplier	×8 base → ×179 maxed
Evolution stages	5
Upgrade levels	70: 25 Engine, 25 Income, 20 Slingshot
Course length	2,900 units
Cost to max everything	75.38M

Flight and distance

The slingshot sets your start, the Engine holds your speed, and you glide as far as they carry you, earning Coins the whole way. Your best distance is what unlocks the next world, and it climbs as you put Coins into the tracks below.

Evolution

Every 5 Engine levels adds a part.

Home world

The Sea page has the full map and the flight walkthrough.

Upgrades

All 70 levels, and what each costs. Income costs the same in every world; Engine and Slingshot get steeper each world (see Economy).

Level	Engine	Income	Slingshot	Plane evolution
1	5,273	100	5,273	Base plane · 150 km/h
2	7,383	150	7,383	—
3	10,336	225	10,336	—
4	14,470	338	14,470	—
5	20,258	506	20,258	—
6	28,362	759	28,362	Left Wing · 150 km/h
7	39,707	1,139	39,707	—
8	55,589	1,709	55,589	—
9	77,825	2,563	77,825	—
10	108.95K	3,844	108.95K	—
11	152.54K	5,767	152.54K	Right Wing · 150 km/h
12	213.55K	8,650	213.55K	—
13	298.97K	12,975	298.97K	—
14	418.56K	19,462	418.56K	—
15	585.99K	29,193	585.99K	—
16	820.38K	43,789	820.38K	Tail · 150 km/h
17	1.15M	65,684	1.15M	—
18	1.61M	98,526	1.61M	—
19	2.25M	147.79K	2.25M	—
20	3.15M	221.68K	3.15M	—
21	4.41M	332.53K	—	Propeller · 150 km/h
22	6.18M	498.79K	—	—
23	8.65M	748.18K	—	—
24	12.11M	1.12M	—	—
25	16.95M	1.68M	—	—

The curve is brutal at the top: the final 5 Engine levels are 81% of the whole Engine track. Budget for the last stage, not the first.

All planes · All worlds