I really like the colors in this set, more colorful pbt sets is always gonna get my interest
One suggestion I might have is, instead of using black text on the majority of keys, why not make those keys blanks instead? Those keys are very tough to read anyway, so the final product would still look pretty similar to what you have now.
Other benefits to doing that would be:
1. Lower costs (I'd assume)
2. Mostly solve the compatibility issue that others have mentioned (though I'd still add numpad keys at the very least)
Just a suggestion! I'll be keeping an eye on this set as it progresses