How to crack the Manuscript

[Aga Tentakulus]

I was thinking of trying simple substitution

Level 1 is a simple substitution. 1-0.
It has only 10 possibilities and follows mathematical rules.
The alphabet, on the other hand, has 26 possibilities and follows linguistic rules. These are unique to each language.
If you can't solve Level 1, then forget everything you've ever seen about the VM.