first upload (v 0.51)

Publishing first version.

Features I've done:

• All the basics you can see: sprites, controls, physics, damaging blocks.
• Weapon behavior (especially laser reflections)
• Soldiers behavior, regrouping when taking losses
• Enemy kicking AI
• Creating both randomized and premade levels.
• Building of blocks and also massive building when you go left or right with RMB pressed
• Showing enemy HP as a number of towers, and making damaged towers non-functional

Features to do:

• Draw better sprites, ideally to make diagonally directed robot sprites
• Find better sounds and music
• Make enemies can shoot and build
• Create more premade levels
• floating numbers about damage
• animate soldiers dying, add blood or something
• animate robot activities: adding sounds, exhausts.