A sandbox mode would be nice. But it would need a few more things to do. Maybe you have another factory that needs recourses to upgrade certain things. (ie: "x" loads of Food allows to to research faster production, "x" iron ores allows to to research cheaper tracks, or "x" of one of the alloys allows to you research cheaper maintanence). Have it so doing this would take away from being able to sell the produce meaning the player has to weigh up setting up a "science" run over selling to get profit.
I thinkt that this could mean there is more involvement at later stages in the game.
Still quite good so far. I hope you develope it further.
Hmm. one thing though. the last wave on the final map is too hard. Purly because the ammount of turrets needed to destroy the final wave causes to much lag to be able to do anything usefull with it.
Would have like to be able to have a few more towers near the end of the game. Got a bit dull only building poison and super towers. I never used any other tower after mission 10. If there were a few booster towers (increase rate/dam/range) it might make using the cheaper towers late game more of an option.
Dragonerdamon - Though when low level ai use "Spark" followed by 4 paralel universes, it does get a bit annoying. low levels should restrict the more "breaking" cards. one game for 5 turns in a row, the level 2 ai lighting bolted me.
Was all right. luckily it ended just as it was getting boring. Once to have max rifle and damage, you easily can afford the big turrets. then you only really need to focus of the big tanks.