Pentomino v1.0

My new creation is a puzzle that I have known since childhood: Pentomino.
The puzzle consists of 12 different pieces (each consisting of 5 squares), which must be placed in a field of 10x6 (squares).
There are 2339 unique solutions of the variant. It's up to you to find them all.
The puzzle comes in 2 variants. A free version and a paid version.
The paid version keeps track of all the solutions you have found and you can change the color settings.
Due to the situation in Ukraine, I have decided to donate part of the proceeds to Giro 555 (Cooperating Aid Organizations).
The base price for the premium version of the puzzle is EUR 1.28.
I will offer the premium version for various prices. Everything you pay more than EUR 1.28 goes to Giro 555.
You can also make a single donation if you wish. This will then go in its entirety to Giro 555.
Go to https://www.excelwell.shop to purchase 1 of the available versions.