First tweaks after Jam

Based on the feedback after Godot Wild Jam #59 I made the first improvements to the game! The game still only contains four levels, but I'm working on improving the skill curve for a better overall experience.

Changes:

• Improved player and wrench-throwing mechanics
• Texture, theme and lighting overhaul
• Enemy indicators for a more dynamic gameplay
• Particles! (Will only be available in the download version for performance reasons)

Once I've tweaked everything to my liking I will upload the updated version