This could be a decent game, but they didn't put enough effort into it.
The atmosphere reminds me of Psychonauts but Insecticide is far worse.
The voice acting is good, and the controls aren't bad (although I'd like more melee attacks). There are action and point-and-click adventure levels, so there's some variety. The enemies have very high accuracy, so it's challenging.
I guess these are all the good things the game has to offer.
Everything else is bad. The game is not complete (Part 2 confirmed for never being released on PC. You can play the full game on Nintendo DS, but with slideshows instead of cutscenes. And without voices, of course). The hitbox of enemies isn't clear (sometimes you're in front of an enemy and you'll miss some hits), there aren't subtitles on cutscenes (even if you turned them on in the options menu).
"Bad conveyance" are another two words that help me to describe this game. You can complete it in less than 4 hours, but you'll probably spend/waste more, because in some levels the game do nothing to point you into the right direction, and a bad palette choice don't help (you'll know what I'm talking about when you reach the level "Pier Pressure")