Envahi remake

I'm making a remake of an old Vic 20 game for a coding competition and my sprite design skills are seriously lacking. On the screen shot attached there are several enemies that I need something much better for. The big, black envelope thing is a grabber. It drops down the screen and then shoots off to the right to grab the helicopter (player) and lift them off screen and out of play. If it's shot it breaks into two parts where the inner section drops to the ground and the upper section flies off up the screen. I need a sprite for the grabber with some kind of basic animation and also the outer and inner section when it gets destroyed. The orange heart shape thing is a zoomer. It tracks left and right from the Dam wall to the edge of the screen and then back, dropping down each time it reaches a dead end. I need some kind of alien type sprite here with some basic animation that looks a lot better than the stupid coder art I've drawn. The big UFO is a place holder. That UFO goes right across the top of the screen and then comes back at random intervals. On it's way back it drops the Droppers (more on those later) as shown. I need something decent in here as I can't use this one as it's not owned by me. Again some basic animation like windows flickering or similar will work fine. The droppers (black ball objects) just fall to the ground when they are spawned, moving randomly left and right along the way, and trying to reach the city below to invade. Need a dying animation on these of maybe 8 or so frames. I also need one more type of enemy sprite with animation for the Nibbler that will work from the right side of the screen to the left and attempts to reach the Dam where it takes a chunk out of it. These only go the one way and I need something nicely animated for this - preferably similar to the look of the original. These also need a dying animation as they stay on screen for a while after being shot and player can't shoot through them so tactically has to move around a bit. Again 8 frames would work fine. Please take a look at the video below which is a play through of the original game I'm remaking to get an idea of how these enemies move and the game will play. Sizes: Grabber = 136 * 45 pixels (as I need it to cover the helicopter when it grabs it.) The two parts when it's broken up should be the same if put together. Video clearly shows how the grabber works. Zoomer = 32 * 32 pixels. Animation of it dying should be the same size. This thing is small so harder to hit as it moves fast. UFO = 250 * 75. It's indestructible and can look the same going left and right so just 8 frames of animation will work fine. Droppers = 45 * 45 will be fine for these. Animation of it dying should be the same size. Ignore the clouds and the player helicopter - i'm happy with those as they are. [login to view URL]