Polish and bug fixes

After playing through the game and receiving feedback from fellow jammers, I made a few changes and fixed some bugs.

- Added second colliders to the NPCs and recycling point as the player character was passing through unintentional causing some confusion
- Ensured message to stop litter bug only appeared when player was in possession of the green recycled product. Also, the NPCs will continue to move if the player isn't in possession of the correct product.
- Adjusted the level at which waste increases and fixed an issue with the game over state not occurring if NPCs had been converted.
- Fixed issue with game win state not occurring if all NPCs had been converted
- Changed font style and colours for better visibility. Also, tweaked the player HUD and added some post-processing

Also created a Win32 build as a fellow itch user wasn't able to run the original build.

**EDIT** Noticed another bug where by the player was unable to create a green alternative after refuelling the machine on the same visit.

**FINAL EDIT** When game win/lose state is achieved, player had no control over mouse. This has now been fixed.