Good job completing this submission, the music and art really tie it all together!
I did have a hard time with the communication of game information. For example, I didn't realize until my 2nd attempt that gases will only be counted as "cleaned" when the sound effect plays, because they became nearly invisible just before that happens and I always stopped cleaning at that point because there were so many other clouds.
Also, I was confused about how the planet was still staying red even when there were no gases onscreen. It feels strange to -> see a gas source about to emit gas, and prepare the proper cleaning tool, -> click and hold on the cloud as soon as it appears, and -> eliminate it as fast as the game will allow, and still see the Earth turn red so fast that games can only last about 30 seconds or so.
Hopefully this feedback is helpful. As you saw, I wasn't even able to complete a game this time- so good job, and I can't wait to see your next project!