Graphical update - just a little bit, is it comform?

So i made a game for the compo, and ppl seem to like the time they spent on it, however everyone tells me basicaly the same - its good, but they would love any indication to how far they threw the hook. I´ dont want to make any big changes, but i would love to implement a simple sign that says "50 Meters" - that way ppl may get into the game a little bit quicker and can enjoy it a little bit longer. Since i dont fix a "bug" i want to ask here first, what do you guys say - would it be ok to add a tiny img?

My Game: https://ldjam.com/events/ludum-dare/48/deeper-fishing

The change i think about is something like this:

changes.png

It will only be a graphical update - no new features come with this little sign - what do you think, is it ok to do this?