I enjoyed playing this game very much, and found it clever to let the player play as the advanced version of the spaceship, before going backwards in time to get the player acquainted with the power-ups that form the ultimate spaceship :)

The idea behind weakening The Cube's defenses in order to attack it was quite interesting, as were the visual effects :) . A variation in the boss's attacks from the midway point of his health bar would have made the game more interesting, but that would be up to the game's creator.

However, pressing the space bar while playing the game makes the page scroll downwards, causing me to lose focus for one too many seconds before I scroll back up and find that my character has died :(

Also, the idea of a space shooter is that you can freely move left and right to avoid bullets and hazards, but in this case, being able to move forwards and backwards (in addition to left and right) would have made the game more enjoyable to play, unless the intention was to make the players confuse the enemy into firing in the wrong direction (the part where the unbreakable blocks prevent you from directly shooting at enemy units, but you can remain in one spot so that they fire at your current position, then maneuver past the blocks so that their bullets miss :) ), as well as to make the high score mode more challenging :o

In a nutshell, I had enjoyed playing this game, and if the above suggestions are taken into account, I would have enjoyed playing this game a lot more :)