sometimes it seems the airplane flies too slowly
It can do that. Especially over sea where there is no scenery to judge speed by. But then, you don't really want to have to make the level too large. The demo is 25 by 30 tiles, so it's reasonably big. The max is 50 by 50 (10 by 10 seems really small).
the shadow of the aircraft
Yeah, the shadow should be bigger on the ground. I scripted it to move slowly away as you get higher, which looks cool, but it stays the same size. Basically, I couldn't be bothered making another animation, but I might eventually.
If you want, you can add also the airplane engine sound
That might be a thing I'd like to add in future.
I mean, shouldn't they at least get destroyed if I get too?
The enemy planes generally don't take as much damage from a collision as you do. I guess they're more sturdily built. When they have no ammo, they speed up and just try to run into you. If they start out with no ammo, their health is also low to start with. Interestingly enough, if they fly over an ammo dump, they reload and slow down to try and shoot you again. Of course, they aren't smart enough to try and collect it.
Well, if you want you can find a music track to be played during the menus
I do plan to have a soundtrack eventually, but it's fairly low on my priority list.
If you pause, you can view the map, although there isn't that much information on it, just you, the runway and the balloon. Other mission types may have more information.
can you post some demos every time you make big process?
I planto, although most of my time at the moment is going into other projects. But I hope to post some more updates, along with some other stuff like AI code scraps and things sometime in the future. Eventually I might release the map maker so you can make your own missions (hopefully I can devise some better tiling tools, cause at the moment it's a pain having to click on every single tile).
About the cheats... well I s'pose I can tell you them. If you want to read them, just copy and paste into notepad:
To activate cheat mode, type 'sheat' (cheat said in a weird accent). Then use one of the following cheats:
type 'force-shield' to activate an energy field around your plane, temporarily warding off most enemy shots and destroying all aircraft.
type 'lock'n'load' to reload 500 rounds
click and drag a circle shape, moving anti-clockwise, starting in the top-right corner, to blow yourself up.
click and drag down, right, down (sort of like a lightning bolt) to do... nothing... yet. In future versions, however.
any other cheats are not yet implemented, I might leave you to discover them for yourself (but then again, I might feel nice...)