The game is to easy, you can't really lose.
Gameplay should revolve more around hitting the sack, it's really fun to hit it around, and seeing it getting faster and faster. :D
My suggestion is implementing highest point which sack has reached.
Viewing post in Hacky Sack Ninja jam comments
The feed back on the game on the tester was that it was to hard at first and was unplayable and a bit annoying so i guess i accidently made it to easy =/ the hacky sack uses to spawn more evil spirits in an earlier build at 1 ghost when its on ground and again every 2 seconds that it remains on the ground and i bumped it up to 5 seconds in this build. to put less punish on player i guess it was to much. But thankyou for trying the game and giving feed back! much apreciated ^^
Thankyou again for your feedback really apreciat it ^^ I ended up fixing some bugs hopefully it is more fun to play now . ninja dog spawns more often and the waves come out in 30 second faster intervals rather than a minute , the pace of the game should go a lot more faster now thanks for all the feed back. also reduced the healing ice cream drop to every 1 minute. the version should be A2.