Yes, that is completely fine, as long as you purchase the package and credit me. All of the information about licencing is also at the bottom of the project page. If you feel like linking to the project when it's done, please do so :)
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Thank you so much for the compliment. You can find more information on custom orders and commissions on my website: https://www.penzilladesign.com/commisions
You are also welcome to contact me with more info about the project you have in mind, and I'll put together an offer PenzillaDesign@gmail.com