Would be nice if you could bring more biöder with other "ideas" inside.

Not very innovative.

I also like to do especially an illuminated chest behind colored glass is even cooler

This does not look very good, however, there are various mods with which you can pretty up something. However, you could use the idea itself with this link and make an entrance from the shop window.

Conclusion:
^——–
Design: 4/5p
Benefit: 4/5p
Specific - Deco Day - Value as decoration: 4/5p
^{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
Total: 12/15p = Good
Result: Positive evaluation, grade 2