Alpha version 0.3 is now available! This was mostly a visual update, so you'll notice the game looks and feels a whole lot better now. And a lot less brown. Big thanks to Jonathan for all his help on the visuals. There's a new level and few sweet gameplay additions too.

Full changelog:

• Added lava that aliens can fall into.
• Added new level: "Furnace for you foe".
• Full refactor of citizen and enemy AI systems.
• Replaced Outpost with Garrison.
• New walkway system. Citizens will now patrol walkways and shoot bugs.
• New wall visuals.
• New materials and lighting for basically everything.
• Changed from gamma colour-space to linear.
• New fog system.
• New citizen spawning system.
• New GPU skinning system for aliens.
• Improved navigation probes.
• New Tesla Tower effects, lightning chains and sounds.
• Some towers now have a flat power usage as well as a battery.
• Reworking of power network system.
• Optimisations to terrain tile placement.
• New citizen shooting effects.
• Press space to start next wave.
• Probes only appear when building.
• Added pause menu with controls.
• New thumper effects.
• Improved siren effects.
• Added some extra camera controls.
• New environment management system.
• Level select screen looks slight worse.
• New bullet tracer effects.
• New sandstorm effects.
• New pheremone effects.
• Changed maximum camera tilt.
• New ground cables.
• Splatter effects now using depth testing shader.
• Bug fixes.
• Balance changes.
• Probably other things...