We have 3 cheats and tips on iPhone. If you have any cheats or tips for Death Ray Manta please send them in here. You can also ask your question on our Death Ray Manta Questions & Answers page.
Don't worry about the the triangular walls that get in your way as you can shoot them to get rid of them.
Make sure you focus on getting all the green and red blobs as those are the ones you need to kill to finish the level.
Concentrate your efforts on getting the Space Tiffin which is on every level as it will give you extra points and a power boost.