[ Каскадный ] · Стандартный · Линейный Sky Force, Ищем ключеделалку, смотрим скриншоты...

[Mugz]

SKY FORCE
Sky Force from Infinite Dreams is an ultimate classic arcade shooter, with 3d interactive objects, outstanding graphics, special effects, soundtrack and 100% of pure gameplay. See how to push the limits of your series60 phone to the maximum. 5 amazingly pixeled levels, tons of enemies to shoot and good old Earth to save.
The game is based on hybrid 2D/3D graphics, ideally suited for mobile segment. 2D backgrounds are mixed with fully textured 3D objects. The game includes 5 stages each one is ended with big boss.

unique features:

1. GAMEPLAY

Addictive gameplay perfectly suited for mobile segment. Based on proven classic "shoot'em up" idea.

- 5 large levels,
- three big bosses,
- plenty of enemies,
- interactive environment elements,
- upgradable unique weapons,
- dynamic weather (rain, clouds, wind),
- ranking system.

2. HIGH QUALITY HYBRID 2D/3D GRAPHICS ENGINE

Amazing graphics and visual effects including:

- textured 3d elements,
- plenty of blended sprites,
- destructable 3d objects,
- huge transparent explosions,
- shadows,
- advanced particle system (fire, water, smoke, sparks).

3. MULTICHANNEL AUDIO SYSTEM

Multichannel audio system with high quality original soundtrack and plenty of ingame sound effects.

4. DIFFICULTY LEVELS

Three levels of difficulty for hardcore-gamers and rookies!

5. HIGHSCORES

Possibility of entering and saving highscores
(separate for each difficulty level).

[Igorik]

Master Smoke, так что с мыслями по поводу алгоритма ключа, выкладывай, сообща разберемся.