You should add some: Sounds,A freeplay (To build your own island with limited money and no levels), A save button, seriously that might help... And a bank to raise money at least +10 or +5 (Though you can only have around 1-3 banks, so people don't exploit it) And a fenced road, so people don't accidentally fall off the island, And there should also be other islands, seeking for war about farther into the game, You should also add propellers to seek other abandoned islands and owned islands, abandoned islands might have money or guns (Adds defense to your island by +1) And there should also be a mini game that's multilayer called "Mini wars" They start with all these police/cops on a propeller ship and they all have to fight! you also might wanna add stores for a random chance of big money or little money, the big money can reach up to 20-50 and small money well 1-20, And maybe a little bit of tips while you might be starting a game?
First of all, your truck moves way to slow, second of all there is for example: 2 items in the same exact Y, In meaning you only have a choice of getting 1 of the falling items, a good game takes time, just saying
here is was you should add: Animals,Trees,Humans (so they can populate your island) And a grid to build your island easier, even a randomizer would be nice!
The game is fun... without the multiplayer! All the players do is just mess up your property randomly! I also realized how this game is like the new Club Penguin! Its like your need your REAL money to get about anything. Sure, make this negative, but its true! That's all this is!