Heads up, if you own Guppy on Mac or iOS, it's disappearing from the App Store on April 4th. Details here: Ninjadodo.itch.io
My Apple Developer subscription is expiring April 4th 2019 and I will not be renewing it as it is currently costing more to keep the license (99 EUR/year) than the game is making in sales on Apple platforms. (...)
The game WILL still be available on itchio (PC/Mac/Linux/Android) and on Steam (PC/Mac/Linux), Google Play (Android) and Kartridge (PC/Mac). (...)
If you currently own the App Store version of Guppy I can send you a key for Steam, itchio, or Google Play instead. Just send a picture of Guppy running on your iDevice or Mac (or other evidence of purchase) to ninjadodogames[at]gmail[dot]com with your preferred platform.
To confirm, Guppy has now been removed from the App Store following the end of my subscription as per Apple's unreasonable policies.