Looks like some input-breaking changes are currently in the Thunderword [experimental] flavor of the app updates published in the past few days. Work is underway to resolve these input errors. Reminder that there are two nearly-identical apps, "Thunderword" and "Thunderword [experimental]" - and both can be installed on your phone or tablet at the same time.
If you need assistance with using both apps on the same device, please ask. In general, you will find that Text Fiction for Thunderword and Incant! for Thunderword show you which is the currently-targeted "engines" to interact with - and allow you to touch and select. Screen shot highlighting example
The Thunderword [experimental] app will get more frequent updates and features. Sometimes things will break, but hopefully having two choices allows you to keep using it without serious interruption. Thank you for your patience.