After operating without fanfare for several months, development studio PushButton Labs has formally announced its existence and stated its plans to target “emerging consumer markets” with web-driven games and other software. The Eugene, Oregon-based studio was established by GarageGames co-founders Jeff Tunnell and Rick Overman; Tunnell was also a co-founder of now-defunct developer Dynamix, where Overman was an early employee. Also on board is fellow GarageGames veteran Tim Aste, who spoke to Gamasutra prior to …