Last Saintess Steam game trainer

I need a lightweight trainer that works with the Windows build of a single-player Steam game called Last Saintess (a tower defense game). Its function should be a reliable “Unlimited Health” for any units, and "Unlimited Coins" toggle that stays active through level changes and game updates. I will supply the game’s current executable and any relevant version details; you deliver a clean, standalone trainer (written in C++, C#, or another language you are comfortable with) that launches alongside Steam, injects safely, and avoids false-positive antivirus flags. Please build with future patches in mind—keep offsets or signatures easy for me to update, and comment your code so I can follow the logic if adjustments are needed. Once ready, I will test on my end and confirm the health lock holds under normal gameplay.