Update!

Question

Oh, no, the chemistry lab is already here!
What's new:
1. Chemistry laboratory.
2. Now you can save (yes, you did not seem)!
3. Bug fixes in translation.
4. A few things.

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Tomorrow or the day after:
1. Oil rig
2. New Year's races to us, soon everything will happen!
Hope and enjoy :)

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https://code.sololearn.com/WmDfIL5AyDN1/?ref=app

Answer 1

code is great, but it is enough to post it in code section 😃