Click the "controls" button to see the game controls. When you get the level select code at the end, you may need to enter it multiple times for it to work.
I used Google to find PNGs to use as sprites for the helicopter, the fire, and the water bucket. I found the sound effects of the helicopter and the fire on Mixkit. I found the sound for the water splash on Free Sounds Library. I found the dragon sound effect on QuickSounds.com. And I found the sound for the laser on Sound Fishing.