Hello and sorry for the delay in replying, unfortunately my work life far exceeds my Construct 2 life! Thank you for the questions.
At current the timer will not continue if you close it. Mostly because I do not know how to implement that! Maybe someone will be able to here.
I have not added different formats for the timer, but it should be relatively easy to do with some event changes.
I know that this timer is missing a lot of features that might be considered standard on many apps, but hopefully it still qualifies as a 'basic timer template', as I simply don't see many people using C2 for things that aren't games I thought I'd make a little something!
Thank you for your feedback!