The bed looks great and you can easily make use of the drawer, it'd be more easier to assemble if:
- Holes where made for some screws that needed use of force to be driven in their respective position in the wood. (or you can just use a driller when assembling).

In general (these are not major issues but would make it fantastic if done)
- More support is needed for the plates above the drawer because it pends a little when stepped on. 
- instead of the three elongated plates that support the bed to the ground at the far end from the drawer you could just make the plates touch the ground as the sides instead of supporting these plates to the sides and then supporting them with three pieces that touches the ground. 

Overall, it's the best - in my opinion - you can get for such an affordable price and it looks great.