One of my favourite budget games on the Amstrad CPC is Operation Gunship - written by The Oliver Twins and published by Codemasters in 1989.
As with most 8-bit budget games the premise is quite simple: control a heavily armed helicopter gunship and you blast your way through an army of enemies in a bid to rescue the hostages.
<untitled helicopter game> will follow the same design with the benefits of modern hardware.
After just two days of development a test level is up and running with a helicopter flying around and able to shoot rockets.
Targetting HTML5 initially though native versions and possibly Android are on the cards if the game turn out well.