Don't worry about posting about the boat, no one really reads the comments to see what people think of the game and if they did they'd totally want spolders.
If it wasn't long you wouldn't play it for long now would you? The point of a long game is that if you like it you get to play it for a long time; a reward.
If it doesn't seem like a reward to play a game you like for a long time then you obviously don't like it that much.
The BIGGEST problem i have with this game is that the baracades could auto-repair after each wave, or have less doors. Seriously, its impossible to hold off every single one.