The game only takes about 16K of your memory. It is supplied with full source code. The program is in public domain so it may be copied or modified without any restrictions. Another great game that many will enjoy. Like I mentioned before, Phoenix can be closely compared to Galaxian, but takes the gameplay one step further.
Phoenix adds a money collection system to the gameplay.
As the player kills more enemies, money may appear for the player to collect. As you collect more money, you are able to choose from items that you are able to buy items from the Phoenix Shop. The Shop has items ranging from weapon upgrades of several strengths, to shielding and radar scramblers. Like most games, the more powerful the weapon, the more it will cost. Phoenix has many levels that get progressively harder.