I was exploring the "Safe" property, and I ended up making two levels based around it.
Reincarnation: GVA4-QKY4
This one isn't too difficult.
Reproduction: N3ZT-B738
Think of this like the "extra level version" of Reincarnation. It's a lot harder, and I recommend that you play it after solving Reincarnation.
I'm pretty sure you can't cheese either one, but let me know if you find a suspicious solution...
