It's not a rip off. It has a similar concept, but original graphics and programming. You're basically saying that MoneySeize is a rip off of Mario. A rip off is when it's an EXACT COPY. Not similar. Learn it.
protip: Don't move left or right unless you HAVE to, and if you do, try to stop immediately, instead of manouvering through at top speed. At a high speed the ship can't go up or down as fast.
Great game, but just a few things you should do.
1.) Fix the background between areas. It's all misaligned and fuzzy.
2.) Make it so it's not impossible to get past some of it. If there are two paths, and two enemies going through each path, you can't make it.
3.) (Optional) Implement Kong's API.
4.) (Optional) Put in shrink powerups or stuff like that. It would be a good addition.
Things I like that you've done:
1.) The submarine, being heavier, is harder to lift. However, with this disadvantage, you should make it so it can stand 2 enemy hits to even it out.
2.) You can move left and right. You'd be amazed how many people forget to do that in Helicopter games.
3.) You've added multiple ships.
Oh, and first!
Necro level guide
Level 1: Go to Plains (Area 2) instantly.
Level 8: Go to Caves. If you die, even at the boss, wait another level.
Level 16: Go to Swamps. Same rule as Caves.
Level 27: Go to the Desert. Again, if you die, wait another level.
I'm only Level 27, so I don't know about much further.
For people complaining about not being able to play on a laptop, get a REAL computer. Laptops were made for people to be able to check their mail and simple stuff while away from home. Not to play games on. (Actually, laptops were made so you can go on the internet at 3AM without anyone noticing XD)
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 "Obey the Game")