Press the green flag. Use arrows to move the orange cat to take the oxygen. WASD to move blue cat. 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. Try to press random keys while moving because they might be helpful.
I made this from the tutorial from udemy. Check the single version: https://scratch.mit.edu/projects/405573104 All my projects are advertisement friendly.