From Beta 0.4.1 to Beta 0.4.5: * Cleaned up the code * Fixed bug: sound is now enabled by default * Added combo gameplay mechanic: seeds fired in rapid succession are more effective * Balancing: * Adjusted beat seed effectiveness: the seeds now lose health when they hit something * The invaders remain inactive for 1.5 seconds instead of just one * Increased the time the seeds remain on the screen From Beta 0.4 to Beta 0.4.1: * Cleaned up the code From Beta 0.3 to Beta 0.4: * Added scaling effect to invaders * Added a blinking effect to expiring seeds * Fixed a bug from seeds which caused them to expire if they were collected on the last possible frame * Balancing: * Increased the time the seeds remain on the screen * Increased the minimum enemy spawn interval from 10s to 13s * Decreased the rate the enemy spawn interval decreases * Decreased the initial enemy spawn interval from 20s to 18s From Beta 0.2 to Beta 0.3: * Added a ripple effect * Changed the enemy graphics from a sprite to a low-poly model * Added display lists for the enemies to make rendering faster * Slowed the players maximum firing rate slightly