ranged items and other stuff i need to make

for first, I think blower is possible by adding y velocity to the player.

for second and third, I don't think it is possible without Java

This, for example, will perform a small jumping action to yet the player about 3 blocks tall.

you can achieve the third by doing something hacky

To extend @CrispyChip (will need java knowledge);

First of all, i need to make elevators that will teleport you to the other block-elevator, where it will be upper than first block.

You can iterate up/down y positions from the block and check for the keybinds, jump and sneak. Do this all on block collision.

Third, i want to make ranged items that will go through the enemy.

Just don't remove it if it hits an entity. Example below,

    protected void onImpact(RayTraceResult result) {
        if (result.getType() == RayTraceResult.Type.ENTITY) {
            Entity entity = ((EntityRayTraceResult)result).getEntity();
            entity.attackEntityFrom(DamageSource.causeThrownDamage(this, this.getThrower()), (float)5);
        }
        else {
            if (!this.world.isRemote) {
                this.world.setEntityState(this, (byte) 3);
                this.remove();
            }
        }
    }

hmmm