Once Pro Shoot

Once Pro Shoot is a 2D vertical shoot-’em-up with a candy / dessert theme, built for mobile-web (WebGL). You drag to move a princess at the bottom of the screen and tap or hold to fire upward at descending dessert enemies and bosses; collecting power-ups triggers a temporary power mode, and game-over posts your score to an online leaderboard.

I was the sole programmer — every line of the game’s code across all branches (~4,900 lines authored) — working alongside an artist and a game designer.

What I built

• Full gameplay — a GameplayManager orchestrating the stage loop, an HP / heart system with a degrading princess skin, power-up → power mode, scoring, and responsive portrait / landscape canvas scaling.
• Clean inheritance hierarchy — BaseMoveObject / BaseSpawnObject subclassed by enemy, boss, and item controllers; pooled bullets and projectiles.
• Data-driven balancing — a Google Sheets → JSON import tool (Sheets API v4 + reflection) so enemy / boss / power / level tuning lives in a spreadsheet, not code.
• Online leaderboard — Firebase (UniTask REST) for username registration and score submission, with a race-guarded leaderboard fetch.
• WebGL-mobile polish — native mobile-keyboard interop via a .jslib bridge, logger disabled in builds, and custom blur and additive shaders.

Engineering notes

• Reuses a studio “engine layer” I maintained across titles — singletons, object pooling, and an audio system with mixer math and BGM cross-fade.

Play it

Try a standalone portfolio demo on itch.io.