v1.2 is mainly difficulty-related changes to bring it closer to the original arcade game:

• Mutants and baiters fire more frequently.
• Landers are more likely to grab a humanoid they pass over, though they now escape a little slower.
• Player shot hit box is slightly longer.
• Pods now break into swarmers when destroyed by a smart bomb.
• The game pools more particles so enemies are less likely to die without an explosion.

Due to the changes in difficulty, this update will reset your saved high score.