Very basic game, to make it better there would need to be more levels with difficulty settings and maybe different game modes (eg: Time mode - race against clock).
@mtndewtaylor7 You said that it would be good to have a gun ; I think that that would make the whole game so much easier and also I think that the creator of this game was very clever to invent a tickling thing unlike the usual games with guns, I think it is a fantastic idea and also much less violent :D therefore having a gun would kind of ruin the uniqueness of this game...
If you have too many bugs and you dont want to get rid of them you can just put them on for sale at a really high price then later when you want them back you can just take them off.
I think that the game could be longer yet I still think it is very good... maybe there could be quests which give you a small amount of money as a reward in different places and you don't know where they are. There could be a shop somewhere where you could use the money you earned to but things.
Excellent game yet I think it should have more levels getting even harder, it would also be a good idea to add more upgrades... You could also make the shop make cakes or something like a bakery would.