Simple game using Max II starter kit

this is the running code: :D

module segmentTrial(clk,tick,seg,seg_sel,mouse,button1,button2,button3,button4);
input clk,button1,button2,button3,button4;
output seg;
output seg_sel;
output tick;
output mouse;
reg tick;
reg mouse;
reg seg;
reg seg_sel;
integer i,r,minute1,second,minute2,hour1,hour2,counter,mouseCom,catch,Buttontiming;
/* 7 segement patern */
parameter one  = 8'b100_1111_1; //159
parameter zero = 8'b000_0001_1; //  3
parameter two  =8'b001_0010_1; // 37
parameter three=8'b000_0110_1; // 13
parameter four =8'b100_1100_1; //153
parameter five =8'b010_0100_1; // 73
parameter six  =8'b010_0000_1; // 65
parameter seven=8'b000_1111_1; // 31
parameter eight=8'b000_0000_1; //  1
parameter nine =8'b000_0100_1; //  9
parameter blank=8'b111_1111_1; //255 */
/*  End of 7 segement patern */
/* mouse pattern ;) */
parameter com0 =8'b010_0000_1; 
parameter com1 =8'b000_1000_0; 
parameter com2 =8'b001_0000_0; 
parameter com3 =8'b010_0000_0; 
parameter com4 =8'b100_000_0; 
parameter com5 =8'b001_0010_0; 
parameter com6 =8'b00_0100_1; 
parameter com7 =8'b100_0100_1; 
parameter com8 =8'b100_0100_0; 
parameter off = 8'b000_0000_0;
/* End of mouse pattern ;) */
initial minute2 = 0;
initial minute1 = 0; 
initial hour2 = 5; 
initial hour1 = 9; 
initial counter = 60;
initial seg_sel = 4'b0001; //intialize seleector digit 1
initial mouse = ~off;
/* 1 minute countdown counter */
always@(posedge clk)
begin
    if(i==16000000) //1Hz
    begin
        i=1;
        counter = counter-1'b1;
        if(counter == 0) //reset everything after count
        begin
            mouse = ~off;
            hour1 = 0;
            hour2 = 0;
        
        end
        
        if(counter != 0); //to prevent displaying something after count zero
        begin
            hour1 = counter % 10;
        end
        
        if(counter == 49 ||counter == 39 || counter == 29 || counter == 19 || counter == 9)
        begin
            hour2 = hour2-1'b1;
        end
    end
    else 
    begin
    i=i+1'b1;  //increament i
    end
    
    if(Buttontiming==4000000) //button detection delay
    begin
        mouseCom = hour1;
        Buttontiming = 1;
        if(mouseCom==3)
        begin
            mouse = ~com1;
            if(button1==0)
            begin
                minute1 = minute1+1'b1;
            end
        end
        else if(mouseCom == 1)
        begin
            mouse = ~com2;
            if(button2 == 0)
            begin
                minute1 = minute1+1'b1;
            end
        end
        else if(mouseCom == 6)
        begin
            mouse = ~com6;
            if(button4 == 0 && button1 == 0)
            begin
                minute1 = minute1+2;
            end
            else if(button4 == 0 || button1 == 0)
            begin
                minute1 = minute1+1'b1;
            end
        end
        else if(mouseCom == 8)
        begin
            mouse = ~com4;
            if(button3 == 0)
            begin
                minute1 = minute1+1'b1;
            end
        end
        else if(minute1 == 10)
        begin
            minute1 = 0;
            minute2 = minute2+1'b1;
        end
        else
        begin
        mouse = ~off;
        end
    end
    else
    begin
    Buttontiming=Buttontiming+1'b1; 
    end
    
end
/* End of 1 minute countdown counter */
/* Segment Selector */
always@(posedge clk)
begin
    if(r==800)
    begin
        tick=~tick;
        r=1;
    end
    else 
    begin
        r=r+1'b1;
    end
    
end
/* End of Segment Selector */
/* 7 segment Display Library */
always@(posedge tick) 
    begin
        seg_sel={seg_sel,seg_sel};
        if(seg_sel==4'b1000)
        begin 
            
                case(hour2)    0:seg=zero;    1:seg=one;    2:seg=two;    3:seg=three;    4:seg=four;
                5:seg=five;    6:seg=six;    7:seg=seven;    8:seg=eight;    9:seg=nine;
                endcase
        end 
        else if(seg_sel==4'b0100)
        begin
        
                case(hour1)    0:seg=zero;    1:seg=one;    2:seg=two;    3:seg=three;    4:seg=four;
                5:seg=five;    6:seg=six;    7:seg=seven;    8:seg=eight;    9:seg=nine;
                endcase
        end
        else if(seg_sel==4'b0010)
        begin
                case(minute2)    0:seg=zero;    1:seg=one;    2:seg=two;    3:seg=three;    4:seg=four;
                5:seg=five;    6:seg=six;    7:seg=seven;    8:seg=eight;    9:seg=nine;
                endcase
        end
        else if(seg_sel==4'b0001)
        begin
                case(minute1)    0:seg=zero;    1:seg=one;    2:seg=two;    3:seg=three;    4:seg=four;
                5:seg=five;    6:seg=six;    7:seg=seven;    8:seg=eight;    9:seg=nine;
                endcase
        end
    end
/* End of 7 segment Display Library*/
endmodule