The ornamental design for a gamemachine, as shown and described.
FIG. 1 is a front, top, right-side perspective view of the game machine;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a right-side elevational view thereof;
FIG. 5 is a left-side elevational view thereof;
FIG. 6 is a rear elevational view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken lines depict unclaimed portions and form no part of the claimed design. The broken lines adjacent to the surface shading define the boundary of the claimed design and form no part of the claimed design.