Hey, great to see this game getting updated all these years later! It seems to run smoother now. Though it seems to have added bugs into the game as well:
1) The end boss level starts at 20% instead of 100%. Plus, when it's defeated, the game doesn't show the credits. The boss continuously explodes and the screen remains white.
2) Pressing the Esc key when exiting a level, also brings the game back to windowed mode.
3) The exit game option doesn't close the game.