The ornamental design for a thumbstickset for gamecontroller, as shown and described.
FIG. 1 is a first perspective view of a thumbstick set for game controller showing my new design;
FIG. 2 is a second perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is aback view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a right side view thereof;
FIG. 7 is a top view thereof;
FIG. 8 is a bottom view thereof; and,
FIG. 9 is a perspective view of the using state of the thumbstick set for game controller thereof.
The broken lines shown in the drawings depict portions of the thumbstick set for game controller in which the design is embodied that form no part of the claimed design.