ShieldGuard

A vertical space shooter defender game.

Core Gameplay。
Control a cyan spaceship in a deep starfield, defending against waves of descending red enemy ships。
Drag anywhere on screen to move your ship and shoot yellow bullets upward to destroy enemies。
Each enemy collision costs a life。

Controls。
Drag gesture to move the ship freely within the lower 65% of the screen。
Reset and Exit buttons available for quick restart or quit。

Enemy Waves。
Red triangular enemies spawn from the top and descend at varying speeds, 4 to 7。
New waves spawn every 55 ticks, with speed and frequency increasing over time for escalating challenge。

Power-ups。
Green orb restores 1 life, max 3 lives。
Yellow orb reduces fire cooldown from 12 to 5 ticks for 180 ticks。

Explosion Effects。
Enemy destruction triggers orange expanding ring particle explosions for satisfying visual feedback。

HUD and Data。
Real-time score, lives, and high score display。
High scores persisted locally via database for competitive replayability。