Video game with mobile device input dynamics

A game device configured for play of a video game, comprising:

• a frame;
• a display coupled to the frame;
• at least one processor coupled to the frame, the least one processor configured to provide display information of a virtual world of game play and game characters in the virtual world for display by the display;
• a touchscreen coupled to the frame, the touchscreen configured to provide user inputs based on contact with the touchscreen;
• and
• at least one motion or orientation related sensor coupled to the frame, the at least one motion or orientation related sensor configured to provide information related to movement or orientation of the frame;
• wherein the at least one processor is configured by program instructions to:
• determine actions of a game character in the virtual world of game play based on the user inputs;
• and
• determine modifications to the virtual world based on the information related to movement or orientation of the frame provided by the at least one motion or orientation related sensor;
• wherein the virtual world exhibits effects of a virtual gravitational field, and the modifications to the virtual world comprise translations of the virtual world in the virtual gravitational field, with the translations including acceleration of portions of the virtual world with respect to the game character at a beginning of the translations and a deceleration of the portions of the virtual world at an end of the translations, and with floating or partially floating objects in the game world and the game character reacting to the acceleration and deceleration.