[Community Puzzle] M.A.R.I. and the crazy factory - Puzzle discussion

Puzzles
#1

Coding Games and Programming Challenges to Code Better

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Created by @nicola,validated by @kitarotao,@cedricdd and @zyzoo.
If you have any issues, feel free to ping them.

#2

Some tests seem to have several solutions. For example for “a key on the ground” I get among others:
x2
x2 tl
p1 x2 tl
p1 x2 p2 tl
p1 x2 tr p2 tl

Seems valid, too, right ?

#3

Hi,

x2 can’t be the only/last instruction since it will run twice the next instruction.

#4

Hi,

Yes, that makes sense but I thought it was a valid instruction anyway…
Thanks for the help.