I think you need to worry less about what the Invisible Buddhist Shrine Police think and just be happy with the fact that you're doing your best to set aside a small place for contemplation
There's no way I can get my Buddha rupa
any higher above my head. First off, it's a standing Buddha, and it's 18 inches tall, and 4 inches wide, so I'm terrified it's going to fall over. Also, my altar is a small dresser stand I inherited from my grandmother when I moved out...it's very narrow, and I barely have enough space to hold the standing Buddha, a candle, incense and burner, flowers, a tiny sitting Buddha, and two Dhamma books (the Dhammapada and In The Buddha's Words
I think it's the thought that counts. I don't have the money or space to set up an elaborate, Thai-style shrine like the ones at the wat, with beautiful hand carved, multiple shelved altars and golden Buddha rupas
everywhere. I just do the best I can. I can't face it directly east, so I have it facing Northeast-ish. I can't get lotuses down here, so I use roses.
Besides, the point is that your shrine is uniquely you!