After sunny woods (the tutorial world) , it does seem to get a little bit repetitive. At this point, I'd stay away from adding an upgrade system. Adding additional enemies would mean additional element and that would just complicate things...so the best option left would probably be to add additional tower(flower) types as you progress through further levels.
The game could use some improvement in terms of difficulty curve. Visiting the bonus level makes the later level way too easy with all the upgrades bought before mission4. Also I would've actually liked to see more of alien fighters or at least some kind of mechanical zombification...rather than just human fighet jets and heli with alien pilots....
noone seemed to have mentioned this yet for some reason..but... the game could use dialogue and a story. I mean..that's what gave the whole epic battle fantasy series it's charm. People keeps mentioning touhou..but what actually made touhou popular was its unique character personalities. If there was ever going to be a sequel..id like to to bosses that were actually characters..and not some generic "bigger version of the common mob enemy"
only thing i dont like about this game is the "check" and "show solution" function.... When a puzzle lets you cheat without any consequence, the feeling of achivement is somewhat diminished even after completeing the level without any hints.
the laser needs somekind of warning before they shoot.. it does change colour while it charge, but having to keep an constant eye on the edge of the screen is just frustrating rather than challenging. Perhaps a thin lasersight line as a warning before it shoots to kill ...would be nice
Only problem is that once things starts looking bleak, you just go spiraling down with no chance of recovery. Bad things just pile over another. In harder difficulty, once they breakthrough your wall and instantly take 4 of your blocks, you know you might as well just start over the game. Maybe there should be somekind of desperate: "you don't really wanna do it but you've got no other choice" last chance recovery mechanism.
Abilities and action related to searching items and characters seems kind of pointless since players end up searching every single square of an area in the end either way. Perhaps there should have been some kind of motive for strategizing time(turns) effecient searches and for clearing the missions in least of days.
to the people saying "why are people complaining about player killers? just look at minimap and ignore them." well...you know what? you are totally right because: a.) my minimap can totally tell the difference between quest related npc ships and angry power players b.) I can see them but there's no way my own ship would ever ever show up on their minimap c.)my standard ship is So very much faster than their real money fueled generators d.) the minimap does not lag at all whatsoever so i can see what's coming from any direction. yup
forget graphics or upgrades or whatever...what this games needs to improve on is bullet behavior scripting. The only kind of bullets i see are the ones that flies straight from point A to B at a steady pace (and occasional lazers that the boss doesnt seem to use). There should be enemies that shoots homing missiles, bullets fired in random direction, bullets aimed directly toward you, bullets that curves, bullets of differnt size,bullets of different firing speed...etc.. dont even bother designing different bullet shapes until they actually behave differently.
I thought the "demo" was part of a joke...a parody of how those retro game of the 90's had shareware demo's saying "register now" all over the place. ...and then I realized that it wasnt a joke. sigh ....