Fix the slowdown/lag and get 5 stars – Hell on Earth (3D FPS) Review

I really enjoyed the first level of this game. Graphics are decent, and it played smoothly. However, the second time I picked it up to play level 2, the game started lagging and slowing down after about 30 seconds. It does this every time I play now. PLEASE FIX!!!!
Review by yyz6785 on Hell on Earth (3D FPS).