Update 4.1 improvements and changes:

- more responsive jumping

- minor main menu polishing 

- option to turn AI on/off with one button ("T" button)

- improved AI balance and gameplay

- headshot convulsion effect adjustments

- additional line of spawn menu options:

1. Crete block

2. Crete box

3. Road block

4. Wicked

5. Demented

6. Medkit

7. Painkillers

8. Supply box