Its still well worth the money
Ive had this app for years and Ive kept it when I updated phones. Ive defeated all the original maps on the highest difficulty setting, but I still come back on occasion to replay some maps. The game play is simple, yet some of the maps are rather challenging to defeat. If youre really in to the maps, last years update doubled the number of available maps with an IAP.
Wavefront about
Slay, v4.1.1