How To Speed Up A Game Made

I have made a program where you are a circle and the enemies are squares coming at you. You press Space to shoot and you gain points every time you hit, using arrow keys to move, there are pickups, etc, etc.However, I no longer want to use placeholder circles which are drawn like this:[code]However, the result is very very slow moving aliens. Its not a slow timer or anything(I have about 2 in there working simultaneously) but poor FPS. It might be my system but when I checked it only took ~10MB of memory. I understand that VB.NET isn't quite the choice for game making since its not as fast as some of the other languages(C++, C#) but is there any way I can draw these without sacrificing FPS?[code]

Okay, once again, explaining everything from the top. CollisionDetect() contains logic for evaluating what has hit what in the entire game. This includes Player and Pickup, Player and Object, Object and Projectile, Object and Advanced Projectile, Object and Player. Next, it evaluates whether or not if a pickup has been used or not. When the player hits a pickup, a boolean is set to true. This means that every iteration of this timer, one is added to variable ResetInt. When this hits 80, or 4 seconds(50ms timer) the pickup's effects are reset. Additionally, the boolean is false, so it won't do that same again.Next, it moves all of the objects on the form. These include the the objects, projectiles and pickups. It also checks if they have reached the end of their 'path' (ie If the projectile goes far enough to the right, it is removed from the game).