I am personally a beginner in construct and I am still on my first game, but i seen your topic question unanswered, so i thought i would see if i could help you out. me and my dad had a conclusion that may work, try to set a instance variable to your text sprite, and have it where when each letter is tapped it sets value to the instance variable, and each number is linked to the responding key, but have it it to where after your tap it afterwards it move a space to the right so the next key doesn't override the first letter, it may work but its just a basic idea concept and if you have been here a while, you should take this basic idea and make it work, i will look more into it, and see if there is a better way if it doesn't work, but try to build on the idea.