I like what you did with this game, flipping between platforms seems like something I would play to kill the hours.
But there's no sound effects or music in your game so after a while it starts getting bleak.
Besides all that an overall 4/5 in my opinion as I'm a fan of very simple games that you can get lost in
Side note: if you want easy sound effects I would recommend sfxr which can be found at https://www.drpetter.se/project_sfxr.html, it generates majority of noises you'll need for making games with just a click.
And if your having trouble programming noises in try:
Public AudioSource audioname;
audioname = audioname.GetComponent<AudioSource>();
audioname.Play();
#and if you want to change sounds in game
Public AudioClip clipname;
audioname.clip = clipname;
audioname.Play();