Stencyl just lacks a lot without mic.
Can you give some examples please?
No microphone recording means:
1. no games controlled or interacted by air blow or sound (sound amplitude/volume);
2. no games with karaoke elements where you are able to listen to your performance;
3. no dictaphone/voice recording software;
4. no creation of musical instruments based on sound sampling (myriads of possibilities, from simple children's games, simple beat makers to advanced software like the one by Smule);
5. no fun gadgets like voice recognition;
6. no advanced languages learning games or software when recordings are compared with preexisting text recording;
7. no 'sound meter' software;
8. no 'musical tuner' software;
etc..
I can probably do without next fancy shader on mobile, but sound recording seams like the one of the very basic things we do with our phones and tablets. On the phone we talk (Mic), we use voice recognition to use the devices in many ways (Mic), we use phones as a handheld audio recorders (Mic), we use phones to record movie's sound when pointing and shooting (Mic and cam), we use sound analyzing for many purposes not even knowing (ex. software like Shazam) etc..
In general I would love to see more game's audio engine oriented ideas implemented. Audio is very basic in Stencyl now. I would gladly help with defining those ideas that would make Stencyl's audio engine shine, but I can tell now, that being able to record sound with a microphone would be a very good start.