The ornamental design for an arrow shaped tileset, as shown and described.
FIG. 1 is a top plan view of arrow shaped tiles showing my new design; and,
FIG. 2 is a perspective top view of the shown in FIG. 1, as fitted in an exemplary tile environment that comprises a series of individual tiles of the same design.
The broken lines are for illustrative purposes only and form no part of the claimed design.