This is my free game assets for 1 - Bit pixel art games: https://pixelator-code.itch.io/1-bit-pixel-art-textures

It doesn't seem like these are your original assets, so charging for them is just wrong.

For example the weapons tiles can be found here:
https://www.deviantart.com/thkaspar/art/1-Bit-Icons-682254106

In addition, your license terms requiring to link to "your" asset on itch.io which is "better than losing money" (implying you will sue someone for some sprites?) is just in really bad taste.