MEASURED IMPROVEMENT · Bubble Zoo
56% more starters reached Level 10 in Bubble Zoo.
We checked whether players were quitting less, playing again after a win, and moving further into the early game.
Telemetry from December 2025 to May 2026.
THE MAIN MOVEMENTS
Before and after, shown side by side.
Reach to Level 10
+56.2%Replay after a win
+7.7 pointsQuit rate
-0.8 pointsWin rate
+1.9 pointsA CLOSER LOOK AT THE DATA
The level-by-level progression view.
The chart follows the change beyond the headline checkpoint.
Early-game reach before and after balancing
This view covers the first 30 levels, where the biggest change happened.
Level 10 reach increased by 56%. Replay after a win also rose and quit rate fell in the later reporting period.
THE NUMBERS BEHIND THE CHART
Early-game reach checkpoints
Both periods are normalised to their own Level 1 player count before comparison.
| Level | Before reach | After reach | Change |
|---|---|---|---|
| Level 1 | 100% | 100% | Starting base |
| Level 5 | 23.96% | 31.89% | +33.1% |
| Level 10 | 8.29% | 12.95% | +56.2% |
| Level 15 | 2.98% | 5.85% | +96.3% |
| Level 20 | 2.20% | 4.18% | +90.0% |
| Level 30 | 1.17% | 1.39% | +18.8% |
Telemetry periods: 1 December 2025–27 February 2026 and 27 February–1 May 2026. Reach is normalised to each period's Level 1 starting point, which makes the progression curves directly comparable.
What was happening
Win rate was one part of the check. We also measured whether players quit less, played again after winning, and continued into the next part of the game.
What the data showed
Quit rate fell from 2.1% to 1.3%. Replay after a win rose from 54.5% to 62.2%, and normalised reach to Level 10 increased from 8.3% to 13.0%.
What we did
We reviewed early-level reach, wins, quits, replay, and token outcomes together. That kept the recommendation focused on player momentum instead of one isolated KPI.
A REAL PART OF THE WORK
Example level recommendations
| Level | Objective | Moves | Token 2 | Token 3 | Check after release |
|---|---|---|---|---|---|
| Level 1 | 10 Leaves | Keep at 20 | 550 | 700 | Quit rate and replay after a win |
| Level 10 | 6 Leaves | 22 → 24 | 500 | 750 | Completion, replay, and Level 11 reach |
| Level 12 | 7 Fish | 36 → 42 | 1,000 | 1,400 | Wins, losses, moves left, and token attainment |