Good, but not very good. Bad, but not very bad.
The good: gorgeous fluid animation of the mech's movement; crush mechanics; nice graphics; fun story.
The bad: too hard; biomass takes a lot of time to accumulate to buy even some of the basic upgrades; individual mods cannot be upgraded, biomass must be shelled out for a whole new mod; boring gameplay.
The ugly: OH GOD MY LANGUAGE CENTER! Please, if you're going to make a flash game in English, make sure you have firm command of the language before setting out.
Really, the very best part for me was how fluidly the mecha was animated, with fallbacks on the legs' positions. Not many games I've seen put that much detail into it. Crush mechanics was almost properly implemented, sometimes the mech would get stuck on the odd wreck without being able to crush it, especially when walking backwards.
The upgrade system could use an overhaul, for example by making the individual mods upgradeable, like user 'Twad' said in the reviews.
Some twists could be added to the gameplay, to make a difference from the usual moveforward-defend-shooteverything-ha rvest-repair-repeat cycle. And no, having enemies coming at me from both sides is not variation.