A few levels from the full version's "Harder" level pack have been added. In campaign mode, there are now a total of 4 levels in the easier level pack, 4 levels in the middle of the normal level pack, and 2 levels towards the later half of the harder level pack for a total of 10 levels in campaign mode. PLUS... In practice mode there are the same 10 levels from campaign mode, plus 5 more for a total of 15 levels. The paid version has 3 level packs of 100 levels each.