Achievement, final boss and elevator fixes + other stuff too

① Unity Engine Upgrade
• Updated the Unity Engine version from 5.6 to 2018.1.9f2
• This change improves overall performance and was essential to fix elevator physics and player interaction issues

② Gameplay Improvements
• Added Weapon Wheel as an alternate weapon of weapon switching for both the mouse + keyboard and controller setups
• Mouse Scroll Weapon Switching polished and improved
• Resolved a bug that caused skipped selections due to inconsistent input logic

③ Achievements
• Changed the way "Evil Nightmare" achievement is obtainable - From now on the "Evil Nightmare" achievement is rewarded for Single Life Mode as it always should have been. Also, achievement descriptions have been updated to properly fit the difficulty modes.
• After the reworked difficulty modes update, these achievements were granted for completing each mode:
---• Casual - Piece of Cake
---• Standard - Come Get Some
---• Hard - Bring it on!
---• Hardcore - No achievement
---• Single Life Mode - No achievement
• We're changing things up to better reflect the current state of the game and difficulty modes, and bringing the achievements in line with how they were intended to be obtainable. After this patch, the achievments will be granted as follows:
---• Casual - Double-edged Sword...
---• Standard - Piece of Cake
---• Hard - Come Get Some
---• Hardcore - Bring it on!
---• Single Life Mode - Evil Nightmare
Due to the nature of this change, the achievements cannot be automatically granted retroactively. However, we have successfully tested a solution that allows us to indirectly grant the Evil Nightmare achievement to players who didn't receive it after their victorious playthrough.
If you beat Project Warlock on the Single Life Mode before this update and did not receive the Evil Nightmare achievement, you can send a request with attached save file to j.cislo@buckshotsoftware.pl to have it added to your account. The save file is located in this directory:
C:\Users\USERNAME\AppData\LocalLow\Buckshot Software\Project Warlock\GOG
We will be able to alter the save file in a way that you will be granted the Evil Nightmare achievement after launching the game. Please note that this solution is for players who completed the ultimate Project Warlock challenge but were not awarded the achievement due to technical issues.

④ Final Boss Balance Adjustments
• Adjusted boss fight phases for better pacing and balance:
---• Phase 1: Maintains a solid amount of HP
---• Phase 2: Slightly lowered the HP pool due to phase-ending animation
---• Phase 3: Slightly reduced HP
---• Phase 4: Retains high amount of HP
---• Phase 5: Lowered HP for a smoother "final blow" phase
• Added more ammo, health, and mana pickups throughout the level

⑤ Elevators
• Elevator system has been fully recoded for better performance and stability
• Fixed occasional issue of falling through the map
• Solved jittering when going up the elevators

⑥ Bug Fixes
• Fixed an issue where dynamite would travel unpredictably when strafing around
• Fixed Sonic Rocket Launcher projectile rendering issues
• Fixed the elevator staggering and making sure you cannot falll through