Hi! I'm sorry to hear that!
You need to get to the top platforms by using the right ramp. Then, go all the way to the left by walking in front of the red atom, and finally, drop down from the platform located at the left of the ramp with the blue atom on top. You don’t actually have to use that final ramp, it's a trick.
Consider replaying it! You can start directly in the level 4 with the main menu. I hope this helps you! I'll be here if you have any dobut.
You can also skip the level from the main menu if you want. You have a stage selector.
I really hope thath you can enjoy the rest of the game!
Thanks.