Press the green flag. Use arrows to move the cat to take the oxygen. Avoid the random popping spikes, or you will be delayed 2 seconds. Press space bar to skip level, R to reset level, and hold R and G together to reset game. There are 8 levels. Take the oxygen in time or the cat dies, but if the cat dies, the cat doesn't die so do you.
I made this from the udemy tutorial. I added skip, reset level, and reset game. Thanks to @AlSweigart for the idea. Check out the multiplayer: https://scratch.mit.edu/projects/411526297