Smooth controls/gameplay, needs work on gfx/plot
Enjoyed the game, it was fun because of the responsive and friendly controls. Difficulty level was good. Lotsa games look great in the visual fx department but lack enjoyable controls/gameplay mechanics, so it's nice to see this game taking the gameplay route here, which is what matters most imho.
The upgrade to the weapon was a nice touch, although the new weapon kinda made using the old one sorta pointless, maybe some further balancing or adding scenarios that make changing weapons useful (example. maybe one gun is better at removing a barrier, etc).
Plot/Dialogue could use some beefing up, was a somewhat shallow and some parts felt like someone was just just reading off a sheet. Most games don't have deep plot anyway so it's not unusual to relegate this sort of thing to the bottom of the priority list.
Sound fx/music was enjoyable and suitable for the gameplay experience. I liked it overall. It wasn't too slow or annoying repetitive, and it wasn't too loud or overpowering. I think it was a good balance.
Graphics are an area that may need some improvement, the facial animations were good, but the quality of the character drawings was somewhat mediocre, perhaps it helped with the smooth gameplay experience to have simplified graphics I suppose, and the quality was sufficient enough to enjoy the experience.
Overall I was entertained with the game and looking forward to the next release.