I don't see the point in the daily monkey dollars if it's too small an amount for anything. You'd have to play for a month straight for a basic upgrade.
These sorts of games are the type where you wish you had an undo button, in case you mess up in only a minor part of the puzzle. It saves you having to restart the whole thing again. Just a heads up for future titles.
When you press reset level, and a ship hasn't a high enough value beam going into it, it'll still make the 'not enough' sound effect until you exit the level.