*Added new Alien Monster (2 Variations)
*Fixed some props positioning
*Improved wave spawner, AI will spawn quicker
*Easy,Normal,Hard will spawn different times. Hard will spawn more in a short period than Normal, and Normal more than Easy
*New menu UI
Steam Build 42b - 06/01
*Fix some animations for new alien monster
*Fixed some UI
*AI despawn in 10 secs, Tripods 60 secs