(Challenging!) How do I make a painting mini-game like in Mario Party?

So, just to put a challenge out there for myself (and others now as well), I decided to do a very small mini-game as found in i.e. Mario Party or Wario Inc.

I would like to have a paint roller follow my mouse (that part is easy), and then I would probably need to leave a color or to reveal parts of another layer/object. The second one seems easier with a masking option. This reveal has to follow the width of the paint roller (minus a few pixels for a convincing effect).

Then, there must be some check to see when it's finished. I.e. ''if 100% of layer "NewPaint" is visible.

It's quite a daunting task but I believe it should be possible within Construct. Though I don't think I can do this alone ^^

Thank you in advance for thinking with me!

I think you can create on start of layout instances with the X,y,z colors you need , and when the paint roller is in touch destroy the instances and create another with the color you like , when all the first created instances are not on the screen you can reveal something

So you mean to cut up the layer with multiple sections basically? It's very well possible and quite easily doable, though it isn't as elegant as I would like to achieve. Nice suggestion though.

I did this with a tilemap:

dropbox.com/s/o0m1gx5tmsfr293/RollerPaint.c3p

I did this with a tilemap:

https://www.dropbox.com/s/o0m1gx5tmsfr293/RollerPaint.c3p?dl=0

Damn I'm impressed by how well/easy this works. Thank you! Great job!

No worries! Glad it worked!