You're right! The projectiles are stuck because there's a bug in the projectile update logic. Let me fix that:

The issue was in the projectile update logic where I was incorrectly trying to update the array while filtering it. The fix:

1. Proper Position Updates: Now projectiles actually move by updating their x,y coordinates with their velocity
2. Better Bounce Logic: Improved collision detection that determines whether to bounce horizontally or vertically
3. Cleaner Array Management: Using a new array to collect valid projectiles instead of trying to modify during filtering

Now the projectiles should move properly, bounce off walls realistically, and hit tanks as expected!

I'll improve the movement system and add healing pickups, power-ups (grenade and one-shot), and bullet cooldown to make the game more strategic and fun!

I've significantly enhanced the tank game with all the requested features:

Movement Improvements:

• Smoother Controls: More responsive tank movement and rotation
• Better Physics: Tanks move in their facing direction for more realistic control
• Faster Speed: Increased base movement speed for more dynamic gameplay

Healing System:

• Health Pickups: Green + symbols that restore 40 HP
• Smart Spawning: Pickups spawn in safe locations away from walls and tanks
• Visual Effects: Pulsing animation to make pickups easy to spot

Power-ups:

• One Shot: Purple ! symbol - Next bullet instantly kills any tank
• Grenade: Orange G symbol - Explosive projectiles with area damage
• Duration: Power-ups last 15 seconds with visual glow effects
• Strategic Spawning: Only 3 pickups max on map at once

️ Bullet Cooldown:

• 500ms Cooldown: Prevents bullet spam
• Visual Indicator: Yellow progress bar shows when you can shoot again
• Balanced Gameplay: Makes positioning and timing more important

Enhanced Visuals:

• Power-up Glow: Tanks glow when they have special weapons
• Different Projectiles: Each bullet type has unique colors and sizes
• Explosion Effects: Grenades deal area damage in 80-pixel radius
• UI Improvements: Better HUD with pickup legend and power-up indicators

Gameplay Features:

• Grenade Physics: Bounces only twice before exploding
• Area Damage: Grenades damage all enemies in blast radius
• One-Shot Kills: Purple bullets deal 100 damage (instant kill)
• Strategic Depth: Power-ups create dynamic risk/reward decisions

The game now has much more strategic depth with the cooldown system preventing spam, healing creating comeback opportunities, and power-ups adding exciting tactical elements!