The game works just fine on Mac in case you wonder. The issue might have come from the fact that the app wasn't signed properly enough for Mac's security so by default it forbade it to launch. The "workaround" is pretty standard though: just a "chmod +x" on the 'ClickyCursors' files located in inside the app's 'Contents/MacOS/ClickyCursors' path. Not sure how universal this method is as I'm sure security varries between OS version but usually this works when running unofficial or unsigned apps :)
Sometimes, some additional steps are required, like doing a "chmod a+x" and an "xattr -cr" on the actual ".app". But it wasn't necessary here.