Just tried now to delete and reinstall it. Still no chance to finish installation.
It seems also in the beginning strange, that while the different parts of content are downloaded I get 5 times a popup with reminding me to use the wifi connection. Is there one reminder not enough or is this the beginning of some kind of bug chain that won't let me play anymore?
It all ends with this asset popup and then the progress bar won't move any further. Same behavior like 9 hours ago.
From a total satisfied 5* rating in google play I had to change it to a 1* because I can't open that game anymore...