Design idea wk8: a social game

My game is a simple bidding game. Basically every player starts up with a fixed amount of coins/money/credit, say 100. Then there are a number of lands for them to fight for. The number of lands can vary with the number of players, say if there are two players, then 5 pieces of land is good enough. Each land stands for one round of bidding. Each round has a limited time for decision, each person needs to place how many coins they will use to bid for that piece of land. Players can strategically place zero coin for one land, if they want to save up coins for later lands.After all players place bid, bid prices are revealed and the one bidding with most coins win that piece of land. If more than one player place the highest bid, then the land is neutral and does not belong to anyone. After all lands are bid, the player who own the most land win the game.