Gameplay tweaks

Gameplay :

• Loots are now converted to HPs at the end of the waves
• Loots to HPs conversion is now following an exponential factor
• Controls reverted to Auto mode : the game is now full auto aim and fire
• No more reload
• Added controller support

Content - Upgrades :

• [NEW] Bounce chance
• [NEW] Piercing chance
• [NEW] Multishot chance
• [NEW] Attraction distance
• [REMOVED] Max ammo
• [REMOVED] Reload rate

Content - Enemies :

• Crab - The crab move speed increases over time, slightly reduce when hit
• Squid - The squid now heals its closest enemies