use proper function to query isTouched
use proper function to query isTouched

switch-education/pxt,switchinnovations/pxt,Microsoft/pxt,switchinnovations/pxt,Microsoft/pxt,playi/pxt,playi/pxt,switch-education/pxt,playi/pxt,switch-education/pxt,switchinnovations/pxt,switch-education/pxt,playi/pxt,Microsoft/pxt,Microsoft/pxt,switchinnovations/pxt,switch-education/pxt,Microsoft/pxt